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103. Synthesis, optoelectronic properties and photovoltaic performances of wide band-gap copolymers based on dibenzosilole and quinoxaline units, rivals to P3HT

Author

Caffy, F., primary, Delbosc, N., additional, Chávez, P., additional, Lévêque, P., additional, Faure-Vincent, J., additional, Travers, J.-P., additional, Djurado, D., additional, Pécaut, J., additional, Grévin, B., additional, Lemaitre, N., additional, Leclerc, N., additional, and Demadrille, R., additional

Published
2016
Full Text
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104. MASSILIA Project. Modelling of the Bay of Marseille : Impact of the Anthropogenic Supply on the marine coastal ecosystem

Author

Pinazo, Christel, Doglioli, Andrea, Faure, Vincent, Fraysse, Marion, Ross, Oliver, Pairaud, Ivane, Petrenko, Anne, Thouvenin, Benedicte, Tronczynski, Jacek, Verney, Romaric, Yohia, Christophe, Pinazo, Christel, Doglioli, Andrea, Faure, Vincent, Fraysse, Marion, Ross, Oliver, Pairaud, Ivane, Petrenko, Anne, Thouvenin, Benedicte, Tronczynski, Jacek, Verney, Romaric, and Yohia, Christophe

Published
2015

105. Low electrical percolation threshold in multiwalled carbon nanotube polymer nanocomposites and charge carrier transport

Author

Boiteux, Gisèle, Levchenko, Volodymyr, Mamunya, Yevgen, Lebedev, Eugene, Jouni, Mohammad, Faure-Vincent, Jérôme, Djurado, D., Massardier, Valérie, Ingénierie des Matériaux Polymères (IMP), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon, Institute of Macromolecular Chemistry of NAS of Ukraine (IMC), National Academy of Sciences of Ukraine (NASU), Science et Ingénierie des Matériaux et Procédés (SIMaP), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National Polytechnique de Grenoble (INPG)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), and Doucet, Florian

Subjects
[CHIM.POLY] Chemical Sciences/Polymers, [CHIM.MATE] Chemical Sciences/Material chemistry, [CHIM.POLY]Chemical Sciences/Polymers, [CHIM.MATE]Chemical Sciences/Material chemistry, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2013

106. Fabrication of magnetic micro/nanotweezers functionalized and dispersed in solution for bio

Author

Iss, C., Helene Joisten, Dietsch, T., Leulmi, S., Sabon, P., Hou Broutin, Y., Livache, T., Faure-Vincent, J., Calemczuk, R., Benoit, C., Peyrade, D., Auffret, S., Gautier, E., Dieny, B., Laboratoire des technologies de la microélectronique (LTM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), SPINtronique et TEchnologie des Composants (SPINTEC), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Clot, Marielle, and Université Joseph Fourier - Grenoble 1 (UJF)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)

Subjects
ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2013

107. Magnetic micro/nano-tweezers functionalized for biological and medical applications

Author

Cécile Iss, Helene Joisten, Selma Leulmi, Mélissa Morcrette, Stéphane Auffret, Eric Gautier, Philippe Sabon, Yanxia Hou, Thierry Livache, Jerome Faure-Vincent, Roberto Calemczuk, David Peyrade, Bernard Dieny, HOU-BROUTIN, Yanxia, SPINtronique et TEchnologie des Composants (SPINTEC), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Service de Physique des Matériaux et Microstructures (SP2M - UMR 9002), Institut Nanosciences et Cryogénie (INAC), Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Chimie pour la Reconnaissance et l’Etude d’Assemblages Biologiques (CREAB), SYstèmes Moléculaires et nanoMatériaux pour l’Energie et la Santé (SYMMES), Institut de Chimie du CNRS (INC)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Electronique Moléculaire Organique et Hybride (LEMOH), Structures et propriétés d'architectures moléculaire (SPRAM - UMR 5819), Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire des technologies de la microélectronique (LTM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), and Université Joseph Fourier - Grenoble 1 (UJF)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS]Physics [physics], ComputingMilieux_MISCELLANEOUS, [PHYS] Physics [physics]
Abstract

International audience

Published
2013

108. MASSILIA: Modélisation de la baie de Marseille: Influence des apports anthropiques de la métropole sur l'écosystème marin

Author

Pinazo, Christel, Fraysse, Marion, Doglioli, Andrea, Faure, Vincent Martin, Ivane Pairaud, Petrenko, Anne, Thouvenin, Benedicte, Tronczynski, Jacek, romaric verney, Yohia, Christophe, Institut méditerranéen d'océanologie (MIO), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), EC2CO PNEC, and Mediterranean Institute of Oceanography

Subjects
Anthropogenic supply, Apports anthropiques, [SDE]Environmental Sciences, ECO3M, MARS3D, Bay of Marseille, physical-biogeochemical coupling, baie de Marseille, North-Western Mediterranean Sea, Méditerranée nord-occidentale, couplage physique et biogéochimique, 3D modelling, modélisation 3D
Abstract

In the framework of sustainable development, the anthropogenic impact of large coastal cities on the marine ecosystem is a key issue. This project aimed to improve our knowledge in marine ecosystem response to the anthropogenic supplies (from rivers, sewage outflows and atmosphere) from large cities. In particular, the goal is to underline how the physical forcing decreases or increases the anthropogenic impact on the coastal ecosystem and the assessment of the chemical contaminant (PCB) inputs (from city to sea) and exports (from mid-sea to open sea)., Dans une perspective de développement durable, il est nécessaire d'appuyer les politiques publiques et les modes de gestion, sur des recherches amont permettant de mieux identifier et évaluer l’influence de l’homme sur son environnement. L’étude de l’impact anthropique des grandes métropoles côtières sur le fonctionnement des écosystèmes marins apparaît une priorité pour un développement durable en Méditerranée. Le projet MASSILIA a consisté en l’étude de l’influence de la grande métropole Marseillaise sur l’environnement marin côtier grâce à des approches de modélisation numérique. L’objectif était de mieux comprendre le fonctionnement particulier de cet écosystème soumis à une influence anthropique multiple : émissaire, fleuves côtiers, Rhône en utilisant l’importante base de données disponibles et en l’intégrant dans des outils numériques. Le projet a tenté de comprendre à partir de l’étude de ce cas particulier, l’influence que peut avoir une grande métropole sur l’environnement côtier. Cette étude s'appuie sur les travaux réalisés dans le cadre des projets METROC et GIRAC, tant du point de vue des mesures des apports par les fleuves côtiers et l'émissaire, que de la modélisation.

Published
2013

109. High tunnel magnetoresistance in epitaxial Fe/MgO/Fe tunnel junctions

Author

F. Canet, E. Popova, M. Sajieddine, Jérôme Faure-Vincent, François Montaigne, Coriolan Tiusan, Michel Hehn, C. Bellouard, E. Jouguelet, and Alain Schuhl

Subjects
Tunnel magnetoresistance, Materials science, Physics and Astronomy (miscellaneous), Condensed matter physics, Ferromagnetism, Ab initio quantum chemistry methods, Epitaxy, Layer (electronics), Quantum tunnelling
Abstract

We report on spin-polarized tunneling in fully epitaxial Fe/MgO/Fe/Co tunnel junctions. By increasing the thickness of the insulating layer (tMgO), we have strongly enhanced the tunnel magnetoresistance. Values up to ∼100% at 80 K (∼67% at room temperature) have been observed with tMgO=2.5 nm. This tunnel magnetoresistance ratio, which is much larger than the one predicted by the Julliere’s model, can be understood in the framework of ab initio calculations.

Published
2003

110. Antiferromagnetic coupling by spin polarized tunneling

Author

François Montaigne, C. Bellouard, Coriolan Tiusan, Alain Schuhl, E. Popova, Etienne Snoeck, Michel Hehn, and Jérôme Faure-Vincent

Subjects
Materials science, Condensed matter physics, Spin polarized tunneling, General Physics and Astronomy, Spin polarized scanning tunneling microscopy, Electron, Epitaxy, Inductive coupling, Antiferromagnetic coupling, Condensed Matter::Materials Science, Ferromagnetism, Condensed Matter::Superconductivity, Condensed Matter::Strongly Correlated Electrons, Quantum tunnelling
Abstract

By performing magnetic studies on Fe/MgO/Fe magnetic tunnel junctions, we provide experimental evidence of room-temperature antiferromagnetic coupling between two ferromagnetic layers across a very thin insulating barrier. Epitaxial growth of the MgO barrier on a very flat Fe layer leads to an extremely low “orange peel” magnetic coupling. Then, antiferromagnetic coupling is observed for MgO thickness, tMgO, below 0.8 nm. The strength of this coupling increases abruptly when reducing tMgO down to 0.5 nm. The shape of the variation of experimental coupling strength J with tMgO, the quantitative value of |J|, and finally, the thickness range of tMgO for which the antiferromagnetic coupling is observed are in good agreement with the equilibrium interlayer exchange theory by the spin polarized quantum tunneling of electrons between the ferromagnetic layers.

Published
2003

111. Highly conductive CuInSe2 nanocrystals with inorganic surface ligands

Author

Angela Fiore, Frédéric Chandezon, Peter Reiss, Jérôme Faure-Vincent, Antoine de Kergommeaux, Rémi de Bettignies, Adam Pron, Laboratoire d'Electronique Moléculaire Organique et Hybride (LEMOH), SYstèmes Moléculaires et nanoMatériaux pour l’Energie et la Santé (SYMMES), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institut National de L'Energie Solaire (INES), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Structures et propriétés d'architectures moléculaire (SPRAM - UMR 5819), Institut Nanosciences et Cryogénie (INAC), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Materials science, Ligand, Chalcogenide, Inorganic chemistry, Condensed Matter Physics, Metal, chemistry.chemical_compound, chemistry, Chemical engineering, Nanocrystal, Oleylamine, Phase (matter), visual_art, Anhydrous, visual_art.visual_art_medium, [CHIM]Chemical Sciences, General Materials Science, Thin film
Abstract

All-inorganic 12-nm CuInSe 2 nanocrystals, surface functionalized with metal chalcogenide complex ligands, were prepared via phase transfer ligand exchange in a biphasic (anhydrous hydrazine/hexane) mixture. I – V characteristics of thin films of these nanocrystals showed a four order of magnitude increase in current density as compared to nanocrystals capped with initial oleylamine ligands.

Published
2012

112. Charge transport in poly(3-hexylthiophene):CdSe nanocrystals hybrid thin films investigated with time-of-flight measurements

Author

Elsa Couderc, Jérôme Faure-Vincent, Nicolas Bruyant, Angela Fiore, Frédéric Chandezon, Peter Reiss, David Djurado, University of Southern California (USC), Laboratoire national des champs magnétiques intenses - Toulouse (LNCMI-T), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Istituto Nanoscienze [Lecce] (NNL), National Research Council of Italy | Consiglio Nazionale delle Ricerche (CNR), Structures et propriétés d'architectures moléculaire (SPRAM - UMR 5819), Institut Nanosciences et Cryogénie (INAC), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Electron mobility, Materials science, Physics and Astronomy (miscellaneous), Analytical chemistry, Nanotechnology, Electron, chemistry.chemical_compound, Time of flight, chemistry, Nanocrystal, Oleylamine, Electric field, [CHIM]Chemical Sciences, Charge carrier, Thin film
Abstract

Charge carrier mobilities and transport dispersivity are studied in hybrid films composed of poly(3-hexylthiophene) and CdSe nanocrystals by the time-of-flight method, using a field range of 105–106 V/cm. It is found that charge transport parameters pass through an optimum for 75 wt. % (36 vol. %) of nanocrystals in the polymer matrix, yielding balanced hole and electron mobilities around 10−3 cm2/V s. Changing the nanocrystal shape from spherical to branched increases the intersite coupling disorder in the hybrid whereas changing the surface ligands from stearate/oleylamine to pyridine decreases it. Both these modifications have an impact on the electric field dependence of the measured mobilities.

Published
2012

113. Surface Oxidation of Tin Chalcogenide Nanocrystals Revealed by 119 Sn–Mössbauer Spectroscopy

Author

Adam Pron, Jérôme Faure-Vincent, Antoine de Kergommeaux, Rémi de Bettignies, Bernard Malaman, Peter Reiss, Laboratoire d'Electronique Moléculaire Organique et Hybride (LEMOH), SYstèmes Moléculaires et nanoMatériaux pour l’Energie et la Santé (SYMMES), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Structures et propriétés d'architectures moléculaire (SPRAM - UMR 5819), Institut Nanosciences et Cryogénie (INAC), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut National de L'Energie Solaire (INES), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Institut Jean Lamour (IJL), and Institut de Chimie du CNRS (INC)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Photoluminescence, Annealing (metallurgy), Chalcogenide, Inorganic chemistry, Analytical chemistry, chemistry.chemical_element, General Chemistry, Surface engineering, Biochemistry, Catalysis, chemistry.chemical_compound, Colloid and Surface Chemistry, chemistry, Nanocrystal, Oxidation state, Mössbauer spectroscopy, [CHIM]Chemical Sciences, Tin
Abstract

Narrow band gap tin(II) chalcogenide (SnS, SnSe, SnTe) nanocrystals are of high interest for optoelectronic applications such as thin film solar cells or photodetectors. However, charge transfer and charge transport processes strongly depend on nanocrystals' surface quality. Using (119)Sn-Mossbauer spectroscopy, which is the most sensitive tool for probing the Sn oxidation state, we show that SnS nanocrystals exhibit a Sn((IV))/Sn((II)) ratio of around 20:80 before and 40:60 after five minutes exposure to air. Regardless of the tin or sulfur precursors used, similar results are obtained using six different synthesis protocols. The Sn((IV)) content before air exposure arises from surface related SnS(2) and Sn(2)S(3) species as well as from surface Sn atoms bound to oleic acid ligands. The increase of the Sn((IV)) content upon air exposure results from surface oxidation. Full oxidation of the SnS nanocrystals without size change is achieved by annealing at 500 °C in air. With the goal to prevent surface oxidation, SnS nanocrystals are capped with a cadmium-phosphonate complex. A broad photoluminescence signal centered at 600 nm indicates successful capping, which however does not reduce the air sensitivity. Finally we demonstrate that SnSe nanocrystals exhibit a very similar behavior with a Sn((IV))/Sn((II)) ratio of 43:57 after air exposure. In the case of SnTe nanocrystals, the ratio of 55:45 is evidence of a more pronounced tendency for oxidation. These results demonstrate that prior to their use in optoelectronics further surface engineering of tin chalcogenide nanocrystals is required, which otherwise have to be stored and processed under inert atmosphere.

Published
2012

114. Comparison of simulations to experiment for a detailed analysis of space-charge-limited transient current measurements in organic semiconductors

Author

Jérôme Faure-Vincent, Marek Zdzislaw Szymanski, Irena Kulszewicz-Bajer, and David Djurado

Subjects
Materials science, Gaussian, Disorder model, Condensed Matter Physics, Space charge, Transient current, Electronic, Optical and Magnetic Materials, Computational physics, Contact barrier, Trap (computing), Organic semiconductor, symbols.namesake, symbols, Transient (oscillation)
Abstract

found for the mobility value. We show that this uncertainty can be significantly reduced to 10% if a field-dependent mobility is taken into account in the framework of the extended Gaussian disorder model. Finally, we demonstrate that this fitting procedure between simulated and experimental transient responses also permits to unambiguously provide the values of the contact barrier, the trap concentration, the trap depth in addition to that of the mobility of carriers.

Published
2012

115. Fabrication and control of synthetic antiferromagnetic nanoparticles released in solution for biological applications

Author

Helene Joisten, Selma Leulmi-Pichot, Thomas Dietsch, Cécile Iss, Jérôme Faure-Vincent, Stephane Auffret, Bernard Dieny, Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information (CEA-LETI), Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), SPINtronique et TEchnologie des Composants (SPINTEC), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Laboratoire d'Electronique Moléculaire Organique et Hybride (LEMOH), SYstèmes Moléculaires et nanoMatériaux pour l’Energie et la Santé (SYMMES), Institut de Chimie du CNRS (INC)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), Joisten, Hélène, Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG)

Subjects
[PHYS.COND]Physics [physics]/Condensed Matter [cond-mat], [PHYS.COND] Physics [physics]/Condensed Matter [cond-mat], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2012

117. Tumbling motion yielding fast displacements of synthetic antiferromagnetic nanoparticles for biological applications

Author

T. Courcier, Bernard Dieny, S. Leulmi, Hélène Joisten, Jérôme Faure-Vincent, Philippe Sabon, Stéphane Auffret, T. Dietsch, SPINtronique et TEchnologie des Composants (SPINTEC), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information (CEA-LETI), Direction de Recherche Technologique (CEA) (DRT (CEA)), SYstèmes Moléculaires et nanoMatériaux pour l’Energie et la Santé (SYMMES), Institut de Chimie du CNRS (INC)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), Joisten, Hélène, and Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG)

Subjects
0303 health sciences, Materials science, Physics and Astronomy (miscellaneous), Field (physics), Condensed matter physics, Nanoparticle, 02 engineering and technology, 021001 nanoscience & nanotechnology, Translation (geometry), Rotation, Displacement (vector), Magnetic field, 03 medical and health sciences, Nuclear magnetic resonance, Antiferromagnetism, Magnetic nanoparticles, [PHYS.COND]Physics [physics]/Condensed Matter [cond-mat], 0210 nano-technology, [PHYS.COND] Physics [physics]/Condensed Matter [cond-mat], 030304 developmental biology
Abstract

International audience; Synthetic antiferromagnetic micro/nanoparticles usable for biological applications were recently developed using a top-down approach, made of alternating NiFe layers and non magnetic Ru spacers. We describe here different types of motions of magnetic particles chains, controlled either by field gradients or alternating magnetic fields and combination of both. Of particular interest is a displacement named “tumbling motion” consisting in a combination of rotation and translation, with friction on the bottom surface of the container, as a bicycle wheel on a horizontal surface. This motion yields a translation speed 10–30 times faster than by using conventional gradient of magnetic field

Published
2011

118. Qplus AFM driven nanostencil

Author

Renaud Demadrille, Jérôme Faure-Vincent, M. Fakir, Mickael Brun, Benjamin Grévin, J. Hayton, Synthèse, Structure et Propriétés de Matériaux Fonctionnels (STEP), SYstèmes Moléculaires et nanoMatériaux pour l’Energie et la Santé (SYMMES), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Laboratoire de Génie Civil et d'Ingénierie Environnementale (LGCIE), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA), Institut de Chimie du CNRS (INC)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)

Subjects
010302 applied physics, Shadow mask, Materials science, Nanotechnology, 02 engineering and technology, 021001 nanoscience & nanotechnology, 01 natural sciences, Stencil, Evaporation (deposition), law.invention, Vibration, chemistry.chemical_compound, [SPI]Engineering Sciences [physics], Silicon nitride, chemistry, law, 0103 physical sciences, Nanometre, Tuning fork, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, 0210 nano-technology, Instrumentation, Nanoscopic scale, ComputingMilieux_MISCELLANEOUS
Abstract

We describe the development of a novel setup, in which large stencils with suspended silicon nitride membranes are combined with atomic force microscopy (AFM) regulation by using tuning forks. This system offers the possibility to perform separate AFM and nanostencil operations, as well as combined modes when using stencil chips with integrated tips. The flexibility and performances are demonstrated through a series of examples, including wide AFM scans in closed loop mode, probe positioning repeatability of a few tens of nanometer, simultaneous evaporation of large (several hundred of micron square) and nanoscopic metals and fullerene patterns in static, multistep, and dynamic modes. This approach paves the way for further developments, as it fully combines the advantages of conventional stenciling with the ones of an AFM driven shadow mask.

Published
2011

119. Synthesis of colloidal CuInSe2 nanocrystals films for photovoltaic applications

Author

Peter Reiss, Angela Fiore, Jérôme Faure-Vincent, Frédéric Chandezon, Antoine de Kergommeaux, Rémi de Bettignies, Nicolas Bruyant, Adam Pron, Laboratoire d'Electronique Moléculaire Organique et Hybride (LEMOH), SYstèmes Moléculaires et nanoMatériaux pour l’Energie et la Santé (SYMMES), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Structures et propriétés d'architectures moléculaire (SPRAM - UMR 5819), Institut Nanosciences et Cryogénie (INAC), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut National de L'Energie Solaire (INES), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)

Subjects
Renewable Energy, Sustainability and the Environment, Selenourea, Layer by layer, Mineralogy, chemistry.chemical_element, Substrate (electronics), [CHIM.MATE]Chemical Sciences/Material chemistry, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, Indium tin oxide, chemistry.chemical_compound, chemistry, Chemical engineering, Oleylamine, Aluminium, Copper chloride, Indium
Abstract

We synthesise 7 nm CuInSe2 nanocrystals of low size and shape dispersion using copper(I) chloride, indium(III) chloride and selenourea as the precursors. The obtained nanocrystals are deposited on indium tin oxide (ITO) covered glass by means of layer-by-layer dip-coating. After each deposition step, a ligand exchange process with 1,2-ethanedithiol (EDT) is carried out. The new ligands interconnect the nanocrystals, which therefore become insoluble during subsequent dip-coating steps. Furthermore, the small EDT molecules replace the long insulating alkyl chains of the oleylamine stabilizing ligands used during the synthesis. I/V measurements of a 1 μm thick film sandwiched between the ITO substrate and an aluminium electrode show a current density of 1 μA/cm2 at 1 V in the dark, which increases to 16 μA/cm2 under illumination with white light.

Published
2011

121. Enhanced Charge Separation in Ternary P3HT/PCBM/CuInS2 Nanocrystals Hybrid Solar Cells

Author

Lefrançois, Aurélie, primary, Luszczynska, Beata, additional, Pepin-Donat, Brigitte, additional, Lombard, Christian, additional, Bouthinon, Benjamin, additional, Verilhac, Jean-Marie, additional, Gromova, Marina, additional, Faure-Vincent, Jérôme, additional, Pouget, Stéphanie, additional, Chandezon, Frédéric, additional, Sadki, Saïd, additional, and Reiss, Peter, additional

Published
2015
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122. Impact of Blend Morphology on Interface State Recombination in Bulk Heterojunction Organic Solar Cells

Author

Bouthinon, Benjamin, primary, Clerc, Raphaël, additional, Vaillant, Jérôme, additional, Verilhac, Jean-Marie, additional, Faure-Vincent, Jérôme, additional, Djurado, David, additional, Ionica, Irina, additional, Man, Gabriel, additional, Gras, Antoine, additional, Pananakakis, Georges, additional, Gwoziecki, Romain, additional, and Kahn, Antoine, additional

Published
2015
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124. Self-polarization phenomenon and control of dispersion of synthetic antiferromagnetic nanoparticles for biological applications

Author

Hélène Joisten, T. Courcier, Jérôme Faure-Vincent, Stéphane Auffret, Bernard Dieny, P. Balint, Philippe Sabon, Joisten, Hélène, SPINtronique et TEchnologie des Composants (SPINTEC), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information (CEA-LETI), Direction de Recherche Technologique (CEA) (DRT (CEA)), SYstèmes Moléculaires et nanoMatériaux pour l’Energie et la Santé (SYMMES), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Institut de Chimie du CNRS (INC)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Materials science, Physics and Astronomy (miscellaneous), Condensed matter physics, Field (physics), Nanoparticle, 02 engineering and technology, 021001 nanoscience & nanotechnology, 01 natural sciences, Magnetic susceptibility, Dipole, 0103 physical sciences, Antiferromagnetism, Magnetic nanoparticles, Condensed Matter::Strongly Correlated Electrons, [PHYS.COND]Physics [physics]/Condensed Matter [cond-mat], 010306 general physics, 0210 nano-technology, Dispersion (chemistry), [PHYS.COND] Physics [physics]/Condensed Matter [cond-mat], Superparamagnetism
Abstract

International audience; Using a top-down approach, synthetic antiferromagnetic micro/nanoparticles usable for biological applications were prepared. These particles exhibit “superparamagneticlike” properties. Their magnetic susceptibility can be accurately controlled by the thickness of the constituting layers. When dispersed in solution, striking differences in their interactions are observed depending on their susceptibility. Above a susceptibility threshold, a phenomenon of self-polarization is observed in zero applied field, resulting in a gradual agglomeration of the particles. In contrast, below the susceptibility threshold, the particles get redispersed in zero field. This is interpreted by a self-consistent model taking into account dipolar interactions between particles and their magnetic susceptibility. ©

Published
2010

125. Nanostructured inorganic-organic hybrid materials based on semiconducting organic nanofibres and quantum dots and their application to plastic solar cells

Author

Chandezon, F., Jiu, T., Sanchez Rodas, L.A., Berson, S., De Bettignies, R., Bailly, S., Tondelier, D., Faure-Vincent, J., Reiss, P., Vuillaume, D., Guillerez, S., Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), and Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)

Published
2010

126. Intrusion of Rhone River diluted water into the Bay of Marseille: Generation processes and impacts on ecosystem functioning

Author

Fraysse, Marion, Pairaud, Ivane, Ross, Oliver N., Faure, Vincent M., Pinazo, Christel, Fraysse, Marion, Pairaud, Ivane, Ross, Oliver N., Faure, Vincent M., and Pinazo, Christel

Abstract

The Rhone River provides the largest inputs of terrestrial freshwater and nutrients into the Mediterranean Sea. The Rhone River diluted water intrusions into the Bay of Marseille were investigated, examining their physical generation processes and associated biogeochemical impact by using in situ observations, remote sensing data, and a three-dimensional physical/biogeochemical coupled model. During our study period from 2007 to 2011, Rhone River intrusions occurred on average 7.6 times per year and affected more frequently the northern part of the bay. A classification of intrusion events in three categories is proposed (short lived, big, and small) as a function of their duration and spatial extent. The intrusions appeared to be driven by: (i) wind forcing, (ii) the presence of a mesoscale eddy, (iii) the Rhone River discharge volume, and (iv) the variation in thermocline depth. Typically, a combination of these favorable factors was necessary to induce an intrusion. An intrusion strongly impacts the biogeochemical functioning of the Bay of Marseille by bringing large quantities of nutrients into the bay. Mass balances were computed allowing us to quantify this impact on the Bay of Marseille. The results show that the ecological impact depends very much on the type of intrusion, with big intrusions having the highest impact.

Published
2014
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127. Impacts of climate change on coastal benthic ecosystems: assessing the current risk of mortality outbreaks associated with thermal stress in NW Mediterranean coastal areas

Author

Pairaud, Ivane, Bensoussan, Nathaniel, Garreau, Pierre, Faure, Vincent, Garrabou, Joaquim, Pairaud, Ivane, Bensoussan, Nathaniel, Garreau, Pierre, Faure, Vincent, and Garrabou, Joaquim

Abstract

In the framework of climate change, the increase in ocean heat wave frequency is expected to impact marine life. Large-scale positive temperature anomalies already occurred in the northwestern Mediterranean Sea in 1999, 2003 and 2006. These anomalies were associated with mass mortality events of macrobenthic species in coastal areas (0–40 m in depth). The anomalies were particularly severe in 1999 and 2003 when thousands of kilometres of coasts and about 30 species were affected. The aim of this study was to develop a methodology to assess the current risk of mass mortality associated with temperature increase along NW Mediterranean continental coasts. A 3D regional ocean model was used to obtain the temperature conditions for the period 2001–2010, for which the model outputs were validated by comparing them with in situ observations in affected areas. The model was globally satisfactory, although extremes were underestimated and required correction. Combined with information on the thermo-tolerance of a key species (the red gorgonian P. clavata) as well as its spatial distribution, the modelled temperature conditions were then used to assess the risk of mass mortality associated with thermal stress for the first time. Most of the known areas of observed mass mortality were found using the model, although the degree of risk in certain areas was underestimated. Using climatic IPCC scenarios, the methodology could be applied to explore the impacts of expected climate change in the NW Mediterranean. This is a key issue for the development of sound management and conservation plans to protect Mediterranean marine biodiversity in the face of climate change

Published
2014
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129. Interlayer magnetic coupling in Fe/MgO junctions characterized by vector magnetization measurements combined with polarized neutron reflectometry

Author

François Montaigne, C. Bellouard, Jérôme Faure-Vincent, H. Fritzsche, M. Gierlings, Michel Hehn, V. Leiner, and Coriolan Tiusan

Subjects
Coupling constant, Coupling, Magnetization, Magnetic anisotropy, Materials science, Field (physics), Condensed matter physics, Neutron reflectometry, Condensed Matter Physics, Anisotropy, Inductive coupling, Electronic, Optical and Magnetic Materials
Abstract

Polarized neutron reflectometry has been combined with vector magnetization measurements to analyze the reversal process of antiferromagnetically coupled Fe layers through an insulating MgO spacer. We show that the use of a simple micromagnetic model applied in a field range where the reversal process is reversible allows us to determine separately the magnetic characteristics of the layers such as the anisotropy, bilinear, and biquadratic coupling constants. Using this analysis technique, we can prove that in a Fe 001 /MgO/Fe trilayer with thicknesses 35 nm/0.6 nm/6 nm, the 90° configuration of the Fe layers occurring during the reversal mechanism is only related to the fourfold Fe anisotropy present in both layers without any biquadratic coupling.

Published
2008

130. Colloidal CuInSe 2 nanocrystals thin films of low surface roughness

Author

Angela Fiore, Peter Reiss, Jérôme Faure-Vincent, Antoine de Kergommeaux, Adam Pron, Kergommeaux, Antoine de, Fiore, Angela, Faure Vincent, Jérôme, Pron, Adam, and Reiss, Peter

Subjects
Materials science, semiconductor nanocrystal, business.industry, Nanotechnology, Substrate (electronics), Surface finish, Dip-coating, Industrial and Manufacturing Engineering, Root mean square, Surface coating, CuInSe2, Nanocrystal, thin film deposition, solar cells, Surface roughness, Optoelectronics, General Materials Science, Electrical and Electronic Engineering, Thin film, business
Abstract

Thin-film processing of colloidal semiconductor nanocrystals (NCs) is a prerequisite for their use in (opto-)electronic devices. The commonly used spin-coating is highly materials consuming as the overwhelming amount of deposited matter is ejected from the substrate during the spinning process. Also, the well-known dip-coating and drop-casting procedures present disadvantages in terms of the surface roughness and control of the film thickness. We show that the doctor blade technique is an efficient method for preparing nanocrystal films of controlled thickness and low surface roughness. In particular, by optimizing the deposition conditions, smooth and pinhole-free films of 11 nm CuInSe2 NCs have been obtained exhibiting a surface roughness of 13 nm root mean square (rms) for a 350 nm thick film, and less than 4 nm rms for a 75 nm thick film.

Published
2013

131. Transport tunnel polarisé en spin dans le système épitaxié Fe/MgO/Fe :interactions magnétiques et symétries électroniques

Author

Faure-Vincent, Jérôme, Laboratoire de physique des matériaux (LPM), Université Henri Poincaré - Nancy 1 (UHP)-Institut National Polytechnique de Lorraine (INPL)-Centre National de la Recherche Scientifique (CNRS), Institut National Polytechnique de Lorraine, and Alain Schuhl

Subjects
magnetic interaction, Spin polarized tunnel transport, thin film growth, Croissance de films minces, Épitaxie par faisceaux moléculaires, Magnetic tunnel junctions, Electronic symmetry, Magnetic coupling by spin polarized tunnel effect, Interaction magnétique, Fer -- Couches minces, [PHYS.COND.CM-GEN]Physics [physics]/Condensed Matter [cond-mat]/Other [cond-mat.other], Magnétorésistance, Molecular bearn epitaxy, Jonctions tunnel magnétiques, Polarisation (électricité), Transport tunnel polarisé en spin, Epitaxie par jet moléculaire, Symétrie électronique, Couplage magnétique par effet tunnel
Abstract

Monocrystalline Fe(1 00)/MgO(1 00)/Fe(1 00) magnetic tunnel junctions (MT J), elaborated by Molecular Beam Epitaxy constitute ideal systems for validation of specific concepts related to the spin polarized transport in crystalline multilayers. The analysis of the band structure shows that the Fe(100) behaves as a half-metal with respect to the 01 electronic symmetry; this new concept of spin polarization/filtering in terms of symmetry being at the origin of huge magnetoresistive effects theoretically predicted in these systems. Our magnetotransport results validate the effects of electronic symmetry filtering. Moreover, they illustrate the influence of the electronic structure on tunnel transport, whose complex mechanisms go weil beyond the free- electron framework. The precise control of the bidimensional epitaxial growth of MgO allowed us the elaboration of extremely thin insulating barriers for which we provide a first experimental proof of magnetic coupling by spin polarized tunneling.; Les jonctions tunnel magnétiques monocristallines Fe(1 00)/MgO(1 00)/Fe(1 00) élaborées par Epitaxie par Jet Moléculaire sont des systèmes modèles pour la va1idation de concepts spécifiques au transport polarisé en ( spin dans les multicouches cristallines. L'analyse de la structure de bande montre que le Fe(100) apparaît comme un demi-métal au regard de la symétrie 01 : cette nouvelle notion de polarisation en terme de symétrie électronique explique les formidables effets magnétorésistifs prédits dans ce système. Nos résultats magnétorésistifs valident les effets de filtrage en symétrie et montrent l'influence de la structure électronique sur le transport dont les mécanismes dépassent le modèle des électrons libres. Parallèlement, la croissance bidimensionnelle du MgO a permis "élaboration de fines couches de MgO pour lesquelles nous avons fourni la première mise en évidence expérimentale d'une interaction antiferromagnétique entre deux couches magnétiques par effet tunnel polarisé en spin.

Published
2005

132. Insulated Molecular Wires: Sheathing Semiconducting Polymers with Organic Nanotubes through Heterogeneous Nucleation.

Author

Raj, Gijo, Boulaoued, Athmane, Lacava, Johann, Biniek, Laure, Mésini, Philippe J., Brinkmann, Martin, Faure‐Vincent, Jérôme, and Guenet, Jean‐Michel

Subjects
NANOWIRES, NANOTUBES, NUCLEATION, CONDUCTING polymers, ELECTRIC cable sheathing
Abstract

Insulated molecular wires formed from organic molecules may have promising applications in organic and flexible electronic devices. Here, the authors provide compelling evidence of the formation of insulated molecular wires by sheathing conducting regioregular poly(3‐butylthiophene‐2,5‐diyl) (P3BT) fibrils with insulating nanotubes from 3,5‐bis‐(5‐hexylcarbamoylpentyloxy)‐benzoic acid decyl ester molecules through a nucleation and growth process. For dilute systems, conducting atomic force microscopy together with force–distance curves and current–voltage spectroscopy are concomitantly performed to sense current from the topmost surface to the core of the composite fibrils at controlled tip indentation depths. Results show that current is sensed only when the core of the nanocomposite fibrils is reached which indicates the presence of an insulating layer around the semiconducting P3BT fibrils. The existence of this molecular nanocomposite is further supported by neutron scattering experiments carried out on more concentrated systems at different temperatures. [ABSTRACT FROM AUTHOR]

Published
2017
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133. Spin polarised tunnel transport in Fe/MgO/Fe epitaxial system : magnetic interactions and electronic symmetries

Author

Faure-Vincent, Jérôme, UL, Thèses, Laboratoire de physique des matériaux (LPM), Université Henri Poincaré - Nancy 1 (UHP)-Institut National Polytechnique de Lorraine (INPL)-Centre National de la Recherche Scientifique (CNRS), Institut National Polytechnique de Lorraine, and Alain Schuhl

Subjects
magnetic interaction, Spin polarized tunnel transport, thin film growth, Croissance de films minces, Épitaxie par faisceaux moléculaires, Magnetic tunnel junctions, Electronic symmetry, Magnetic coupling by spin polarized tunnel effect, Interaction magnétique, [PHYS.COND.CM-GEN] Physics [physics]/Condensed Matter [cond-mat]/Other [cond-mat.other], [PHYS.COND.CM-GEN]Physics [physics]/Condensed Matter [cond-mat]/Other [cond-mat.other], Fer -- Couches minces, Magnétorésistance, Molecular bearn epitaxy, Jonctions tunnel magnétiques, Polarisation (électricité), Transport tunnel polarisé en spin, Epitaxie par jet moléculaire, Symétrie électronique, Couplage magnétique par effet tunnel
Abstract

Monocrystalline Fe(1 00)/MgO(1 00)/Fe(1 00) magnetic tunnel junctions (MT J), elaborated by Molecular Beam Epitaxy constitute ideal systems for validation of specific concepts related to the spin polarized transport in crystalline multilayers. The analysis of the band structure shows that the Fe(100) behaves as a half-metal with respect to the 01 electronic symmetry; this new concept of spin polarization/filtering in terms of symmetry being at the origin of huge magnetoresistive effects theoretically predicted in these systems. Our magnetotransport results validate the effects of electronic symmetry filtering. Moreover, they illustrate the influence of the electronic structure on tunnel transport, whose complex mechanisms go weil beyond the free- electron framework. The precise control of the bidimensional epitaxial growth of MgO allowed us the elaboration of extremely thin insulating barriers for which we provide a first experimental proof of magnetic coupling by spin polarized tunneling., Les jonctions tunnel magnétiques monocristallines Fe(1 00)/MgO(1 00)/Fe(1 00) élaborées par Epitaxie par Jet Moléculaire sont des systèmes modèles pour la va1idation de concepts spécifiques au transport polarisé en ( spin dans les multicouches cristallines. L'analyse de la structure de bande montre que le Fe(100) apparaît comme un demi-métal au regard de la symétrie 01 : cette nouvelle notion de polarisation en terme de symétrie électronique explique les formidables effets magnétorésistifs prédits dans ce système. Nos résultats magnétorésistifs valident les effets de filtrage en symétrie et montrent l'influence de la structure électronique sur le transport dont les mécanismes dépassent le modèle des électrons libres. Parallèlement, la croissance bidimensionnelle du MgO a permis "élaboration de fines couches de MgO pour lesquelles nous avons fourni la première mise en évidence expérimentale d'une interaction antiferromagnétique entre deux couches magnétiques par effet tunnel polarisé en spin.

Published
2005

134. Transport tunnel polarisé en spin dans dans le système épitaxié Fe/MgO/Fe : Interactions magnétiques et Symétries électroniques

Author

FAURE-VINCENT, Jerome, Laboratoire de physique des matériaux (LPM), Université Henri Poincaré - Nancy 1 (UHP)-Institut National Polytechnique de Lorraine (INPL)-Centre National de la Recherche Scientifique (CNRS), Institut National Polytechnique de Lorraine - INPL, and SCHUHL Alain(schuhl@lpm.u-nancy.fr)

Subjects
magnetic interaction, electronic symmetry, magnetic coupling by spin polarized tunnel effect, thin film growth, interaction magnétique, spin polarized tunnel transport, magnetic tunnel junctions, molecular beam epitaxy, transport tunnel polarisé en spin, couplage magnétique par effet tunnel, épitaxie par jet moléculaire, croissance de films minces, jonctions tunnel magnétiques, [PHYS.COND]Physics [physics]/Condensed Matter [cond-mat], symétrie électronique, [PHYS.PHYS.PHYS-DATA-AN]Physics [physics]/Physics [physics]/Data Analysis, Statistics and Probability [physics.data-an]
Abstract

Jury: B. Dieny, H. Dreyssé, A. George, P. Grünberg,A. Schuhl,E. Snoeck,C. Tiusan; Monocrystalline Fe(100)/MgO(100)/Fe(100) magnetic tunnel junctions (MTJ), elaborated by Molecular Beam Epitaxy constitute ideal systems for validation of specific concepts related to the spin polarized transport in crystalline multilayers. The analysis of the band structure shows that the Fe(100) behaves as a half-metal with respect to the D1 electronic symmetry; this new concept of spin polarization/filtering in terms of symmetry being at the origin of huge magnetoresistive effects theoretically predicted in these systems. Our magnetotransport results validate the effects of electronic symmetry filtering. Moreover, they illustrate the influence of the electronic structure on tunnel transport, whose complex mechanisms go well beyond the free-electron framework. The precise control of the bidimensional epitaxial growth of MgO allowed us the elaboration of extremely thin insulating barriers for which we provide a first experimental proof of magnetic coupling by spin polarized tunneling.; Les jonctions tunnel magnétiques monocristallines Fe(100)/MgO(100)/Fe(100) élaborées par Epitaxie par Jet Moléculaire sont des systèmes modèles pour la validation de concepts spécifiques au transport polarisé en spin dans les multicouches cristallines. L'analyse de la structure de bande montre que le Fe(100) apparaît comme un demi-métal au regard de la symétrie D1 : cette nouvelle notion de polarisation en terme de symétrie électronique explique les formidables effets magnétorésistifs prédits dans ce système. Nos résultats magnétorésistifs valident les effets de filtrage en symétrie et montrent l'influence de la structure électronique sur le transport dont les mécanismes dépassent le modèle des électrons libres. Parallèlement, la croissance bidimensionnelle du MgO a permis l'élaboration de fines couches de MgO pour lesquelles nous avons fourni la première mise en évidence expérimentale d'une interaction antiferromagnétique entre deux couches magnétiques par effet tunnel polarisé en spin.

Published
2004

135. Interfacial Resonance State Probed by Spin-Polarized Tunneling in EpitaxialFe/MgO/FeTunnel Junctions

Author

Coriolan Tiusan, C. Bellouard, Alain Schuhl, E. Jouguelet, Jérôme Faure-Vincent, and Michel Hehn

Subjects
Materials science, Magnetoresistance, Condensed matter physics, General Physics and Astronomy, Biasing, Electronic structure, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, Condensed Matter::Materials Science, Magnetization, Tunnel magnetoresistance, Tunnel effect, Tunnel junction, Condensed Matter::Superconductivity, Quantum tunnelling
Abstract

The direct impact of the electronic structure on spin-polarized transport has been experimentally proven in high-quality Fe/MgO/Fe epitaxial magnetic tunnel junctions, with an extremely flat bottom Fe/MgO interface. The voltage variation of the conductance points out the signature of an interfacial resonance state located in the minority band of Fe(001). When coupled to a metallic bulk state, this spin-polarized interfacial state enhances the band matching at the interface and therefore increases strongly the conductivity in the antiparallel magnetization configuration. Consequently, the tunnel magnetoresistance is found to be positive below 0.2 V and negative above. On the other hand, when the interfacial state is either destroyed by roughness-related disorder or not coupled to the bulk, the magnetoresistance is almost independent on the bias voltage.

Published
2004

136. Interfacial resonance state probed by spin-polarized tunneling in epitaxial Fe/MgO/Fe tunnel junctions

Author

C, Tiusan, J, Faure-Vincent, C, Bellouard, M, Hehn, E, Jouguelet, and A, Schuhl

Abstract

The direct impact of the electronic structure on spin-polarized transport has been experimentally proven in high-quality Fe/MgO/Fe epitaxial magnetic tunnel junctions, with an extremely flat bottom Fe/MgO interface. The voltage variation of the conductance points out the signature of an interfacial resonance state located in the minority band of Fe(001). When coupled to a metallic bulk state, this spin-polarized interfacial state enhances the band matching at the interface and therefore increases strongly the conductivity in the antiparallel magnetization configuration. Consequently, the tunnel magnetoresistance is found to be positive below 0.2 V and negative above. On the other hand, when the interfacial state is either destroyed by roughness-related disorder or not coupled to the bulk, the magnetoresistance is almost independent on the bias voltage.

Published
2004

137. Spin polarized transport in epitaxial Fe/MgO/Fe magnetic tunnel junctions: magnetic interactions and electronic symmetries

Author

FAURE-VINCENT, Jerome, TIUSAN, Coriolan Viorel, Laboratoire de physique des matériaux (LPM), Université Henri Poincaré - Nancy 1 (UHP)-Institut National Polytechnique de Lorraine (INPL)-Centre National de la Recherche Scientifique (CNRS), Institut National Polytechnique de Lorraine - INPL, and SCHUHL Alain(schuhl@lpm.u-nancy.fr)

Subjects
magnetic interaction, electronic symmetry, magnetic coupling by spin polarized tunnel effect, thin film growth, interaction magnétique, spin polarized tunnel transport, magnetic tunnel junctions, molecular beam epitaxy, transport tunnel polarisé en spin, couplage magnétique par effet tunnel, épitaxie par jet moléculaire, croissance de films minces, jonctions tunnel magnétiques, [PHYS.COND]Physics [physics]/Condensed Matter [cond-mat], symétrie électronique, [PHYS.PHYS.PHYS-DATA-AN] Physics [physics]/Physics [physics]/Data Analysis, Statistics and Probability [physics.data-an], [PHYS.PHYS.PHYS-DATA-AN]Physics [physics]/Physics [physics]/Data Analysis, Statistics and Probability [physics.data-an], [PHYS.COND] Physics [physics]/Condensed Matter [cond-mat]
Abstract

Monocrystalline Fe(100)/MgO(100)/Fe(100) magnetic tunnel junctions (MTJ), elaborated by Molecular Beam Epitaxy constitute ideal systems for validation of specific concepts related to the spin polarized transport in crystalline multilayers. The analysis of the band structure shows that the Fe(100) behaves as a half-metal with respect to the D1 electronic symmetry; this new concept of spin polarization/filtering in terms of symmetry being at the origin of huge magnetoresistive effects theoretically predicted in these systems. Our magnetotransport results validate the effects of electronic symmetry filtering. Moreover, they illustrate the influence of the electronic structure on tunnel transport, whose complex mechanisms go well beyond the free-electron framework. The precise control of the bidimensional epitaxial growth of MgO allowed us the elaboration of extremely thin insulating barriers for which we provide a first experimental proof of magnetic coupling by spin polarized tunneling., Les jonctions tunnel magnétiques monocristallines Fe(100)/MgO(100)/Fe(100) élaborées par Epitaxie par Jet Moléculaire sont des systèmes modèles pour la validation de concepts spécifiques au transport polarisé en spin dans les multicouches cristallines. L'analyse de la structure de bande montre que le Fe(100) apparaît comme un demi-métal au regard de la symétrie D1 : cette nouvelle notion de polarisation en terme de symétrie électronique explique les formidables effets magnétorésistifs prédits dans ce système. Nos résultats magnétorésistifs valident les effets de filtrage en symétrie et montrent l'influence de la structure électronique sur le transport dont les mécanismes dépassent le modèle des électrons libres. Parallèlement, la croissance bidimensionnelle du MgO a permis l'élaboration de fines couches de MgO pour lesquelles nous avons fourni la première mise en évidence expérimentale d'une interaction antiferromagnétique entre deux couches magnétiques par effet tunnel polarisé en spin.

Published
2004

140. Synthesis, optoelectronic and photovoltaic properties of conjugated alternating copolymers incorporating 2,1,3-benzothiadiazole or fluorenone units: a comparative study

Author

Delbosc, Nicolas, primary, Yahya, Wan Zaireen Nisa, additional, Lemaitre, Noëlla, additional, Berson, Solenn, additional, Fuchs, Franz, additional, Grévin, Benjamin, additional, Faure-Vincent, Jérôme, additional, Travers, Jean-Pierre, additional, and Demadrille, Renaud, additional

Published
2014
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141. Development of a 3D Coupled Physical-Biogeochemical Model for the Marseille Coastal Area (NW Mediterranean Sea): What Complexity Is Required in the Coastal Zone?

Author

Fraysse, Marion, Pinazo, Christel, Faure, Vincent Martin, Fuchs, Rosalie, Lazzari, Paolo, Raimbault, Patrick, Pairaud, Ivane, Fraysse, Marion, Pinazo, Christel, Faure, Vincent Martin, Fuchs, Rosalie, Lazzari, Paolo, Raimbault, Patrick, and Pairaud, Ivane

Abstract

Terrestrial inputs (natural and anthropogenic) from rivers, the atmosphere and physical processes strongly impact the functioning of coastal pelagic ecosystems. The objective of this study was to develop a tool for the examination of these impacts on the Marseille coastal area, which experiences inputs from the Rhone River and high rates of atmospheric deposition. Therefore, a new 3D coupled physical/biogeochemical model was developed. Two versions of the biogeochemical model were tested, one model considering only the carbon (C) and nitrogen (N) cycles and a second model that also considers the phosphorus (P) cycle. Realistic simulations were performed for a period of 5 years (2007-2011). The model accuracy assessment showed that both versions of the model were able of capturing the seasonal changes and spatial characteristics of the ecosystem. The model also reproduced upwelling events and the intrusion of Rhone River water into the Bay of Marseille well. Those processes appeared to greatly impact this coastal oligotrophic area because they induced strong increases in chlorophyll-a concentrations in the surface layer. The model with the C, N and P cycles better reproduced the chlorophyll-a concentrations at the surface than did the model without the P cycle, especially for the Rhone River water. Nevertheless, the chlorophyll-a concentrations at depth were better represented by the model without the P cycle. Therefore, the complexity of the biogeochemical model introduced errors into the model results, but it also improved model results during specific events. Finally, this study suggested that in coastal oligotrophic areas, improvements in the description and quantification of the hydrodynamics and the terrestrial inputs should be preferred over increasing the complexity of the biogeochemical model.

Published
2013
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144. Publisher’s Note: Interlayer Magnetic Coupling Interactions of Two Ferromagnetic Layers by Spin Polarized Tunneling [Phys. Rev. Lett.89, 107206 (2002)]

Author

Jérôme Faure-Vincent, Michel Hehn, E. Popova, C. Bellouard, Coriolan Tiusan, François Montaigne, and Alain Schuhl

Subjects
Materials science, Condensed matter physics, Ferromagnetism, Spin polarization, Spin polarized tunneling, General Physics and Astronomy, Spin polarized scanning tunneling microscopy, Inductive coupling, Quantum tunnelling
Published
2002

145. Interlayer Magnetic Coupling Interactions of Two Ferromagnetic Layers by Spin Polarized Tunneling

Author

C. Bellouard, Jérôme Faure-Vincent, François Montaigne, Michel Hehn, E. Popova, Coriolan Tiusan, and Alain Schuhl

Subjects
Coupling, Materials science, Condensed matter physics, Spin polarized tunneling, General Physics and Astronomy, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, Epitaxy, Inductive coupling, Condensed Matter::Materials Science, Tunnel magnetoresistance, Ferromagnetism, Condensed Matter::Superconductivity, Antiferromagnetism, Condensed Matter::Strongly Correlated Electrons, Quantum tunnelling
Abstract

Magnetic interactions involving ferromagnetic layers separated by an insulating barrier have been studied experimentally on a fully epitaxial hard-soft magnetic tunnel junction: Fe/MgO/Fe/Co. For a barrier thickness below 1 nm, a clear antiferromagnetic interaction is observed. Moreover, when reducing the MgO thickness from 1 to 0.5 nm, the coupling strength increases up to J=-0.26 erg.cm(-2). This behavior, well fitted by theoretical models, provides an unambiguous signature of the interlayer exchange coupling by spin-polarized quantum tunneling.

Published
2002

146. Epitaxial MgO layer for low-resistance and coupling-free magnetic tunnel junctions

Author

Jérôme Faure-Vincent, Stéphane Andrieu, Etienne Snoeck, Michel Hehn, E. Popova, Hélène Fischer, V. Da Costa, Coriolan Tiusan, C. Bellouard, M. Alnot, François Montaigne, Alain Schuhl, Laboratoire de physique des matériaux (LPM), Université Henri Poincaré - Nancy 1 (UHP)-Institut National Polytechnique de Lorraine (INPL)-Centre National de la Recherche Scientifique (CNRS), Centre d'élaboration de matériaux et d'études structurales (CEMES), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie de Toulouse (ICT-FR 2599), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA), Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut de Chimie de Toulouse (ICT), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS), Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, and Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)

Subjects
010302 applied physics, Materials science, Physics and Astronomy (miscellaneous), Condensed matter physics, Magnetoresistance, 02 engineering and technology, 021001 nanoscience & nanotechnology, Magnetic hysteresis, 01 natural sciences, Magnetization, Tunnel magnetoresistance, Hysteresis, Tunnel effect, Ferromagnetism, 0103 physical sciences, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], 0210 nano-technology, ComputingMilieux_MISCELLANEOUS, Molecular beam epitaxy
Abstract

Epitaxially grown magnetic tunnel junctions MgO(100)/Fe/MgO/Fe/Co/Pd have been elaborated by molecular beam epitaxy, with insulating layer thickness down to 0.8 nm. The continuity of this layer was checked at different spatial scales by means of morphological (high resolution transmission electronic microscopy), electric (local impedance), and magnetic (magnetoresistance and hysteresis loop) measurements. These junctions show a low resistance (4 kΩ μm2), tunnel magnetoresistance up to 17%, and a very small interlayer magnetic coupling.

Published
2002

148. Validation of remote sensing and weather model forecasts in the Agulhas ocean area to 57 degrees S by ship observations

Author

Messager, Christophe, Faure, Vincent, Messager, Christophe, and Faure, Vincent

Abstract

The region south of South Africa, encompassing the Agulhas Current and Retroflection, and part of the Southern Ocean, is known for its severe meteorological conditions. Because of these conditions, in-situ observations are rare. Consequently, remote-sensing satellite observations and high-resolution regional weather forecasts at the ocean surface are difficult to assess. However, atmospheric data collected in the southern hemisphere summer of 2008 during the International Polar Year-BONUS-GoodHope campaign were used to validate two satellite data sets: the twice daily QuikSCAT winds and the daily OAflux data set of latent and sensible heat fluxes. The surface winds and heat fluxes forecasts produced by a regional atmospheric model were also assessed along the ship track. In this study, we have shown that the two data sets exhibited a very good accordance with daily in-situ observations. During the campaign, the correlation coefficients for wind speed and direction were 0.97 and 0.91, respectively, and those for latent and sensible heat fluxes were 0.92 and 0.90, respectively. The QuikSCAT wind speed was underestimated by 1.37 m/s relative to in-situ data, south of the Subtropical Front. Large differences in heat fluxes in both OAflux and the atmospheric model were observed when crossing the Subtropical Front and a warm eddy, as well as during a storm, when gale force winds reached more than 20 m/s. The two data sets were then used to assess the regional model forecasts over a larger area south of South Africa, not limited to the ship track. Most of the model errors were located in a region north of the Subtropical Front, where the sea surface temperature used by the model was not accurate enough to reproduce the relevant mesoscale oceanic features driving the spatial variability of the surface winds and heat fluxes. Finally, compared to in-situ and remote sensing observations, the numerical modelling weather forecast produced realistic atmospheric conditions over th

Published
2012
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