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2. Low-energy spin precession in the molecular field of a magnetic thin film

Author

François Montaigne, Daniel Lacour, Christopher Vautrin, Michel Hehn, Mairbek Chshiev, Wolfgang Weber, Yuan Lu, Coriolan Tiusan, Lacour, Daniel, Institut Jean Lamour (IJL), Institut de Chimie du CNRS (INC)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), Technical University of Cluj-Napoca, SPINtronique et TEchnologie des Composants (SPINTEC), Centre National de la Recherche Scientifique (CNRS)-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)-Université Grenoble Alpes (UGA), Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), 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, 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), Université de Lorraine (UL)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université de Strasbourg (UNISTRA)-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)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, and 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)

Subjects
Range (particle radiation), Materials science, Condensed Matter - Mesoscale and Nanoscale Physics, Condensed matter physics, Spintronics, Field (physics), General Physics and Astronomy, FOS: Physical sciences, 02 engineering and technology, Electron, 021001 nanoscience & nanotechnology, 01 natural sciences, 0103 physical sciences, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), Precession, Thin film, [PHYS.COND]Physics [physics]/Condensed Matter [cond-mat], 010306 general physics, 0210 nano-technology, Spin (physics), Electronic band structure, [PHYS.COND] Physics [physics]/Condensed Matter [cond-mat]
Abstract

International audience; Electronic spin precession and filtering are measured in the molecular field of magnetic thin films. The conducted lab-on-chip experiments allow injection of electrons with energies between 0.8 and 1.1 eV, an energy range never explored up to now in spin precession experiments. While filtering angles agree with previous reported values measured at much higher electron energies, spin precession angles of 2.5° in CoFe and 0.7° in Co per nanometer film thickness could be measured which are 30 times smaller than those previously measured at 7 eV. Band structure effects and layer roughness are responsible for these small precession angle values.

Published
2020
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4. Biochip based on arrays of switchable magnetic nano-traps

Author

Daniel Lacour, François Montaigne, Christopher Vautrin, Maria Vyazmensky, Stephan Mc. Murtry, Robert S. Marks, Stanislav Engel, Michel Hehn, Institut Jean Lamour (IJL), Université de Lorraine (UL)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Ben-Gurion University of the Negev (BGU), Nanyang Technological University [Singapour], IMPACT N4S, ANR-15-IDEX-0004,LUE,Isite LUE(2015), Institut de Chimie du CNRS (INC)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), and ANR-15-IDEX-04-LUE,LUE,Lorraine Université d'Excellence(2016)

Subjects
Analyte, Materials science, Magnetic domains walls, Nanotechnology, 02 engineering and technology, 01 natural sciences, Nano, Magnetic nano-traps, Materials Chemistry, Microelectronics, Electrical and Electronic Engineering, [SDV.BBM.BC]Life Sciences [q-bio]/Biochemistry, Molecular Biology/Biochemistry [q-bio.BM], Biochip, Instrumentation, Magnetic beads, business.industry, Bilayer, 010401 analytical chemistry, Metals and Alloys, Magnetic nanowires, 021001 nanoscience & nanotechnology, Condensed Matter Physics, equipment and supplies, [SDV.BBM.BC]Life Sciences [q-bio]/Biochemistry, Molecular Biology/Biomolecules [q-bio.BM], 0104 chemical sciences, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, Bio-assay, Peptide, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], Magnetic layer, 0210 nano-technology, business, human activities, Test solution
Abstract

International audience; Magnetic biochips based on switchable magnetic nano-traps were developed and optimized so as to enable faster bio-assays via a reduction of steps and the efficient capture of analytes in a sample test solution. Nano-traps are based on snake shaped magnetic nanowires made by microelectronic technics from a thin magnetic layer. This optimized design ensures high local fields when the trap is activated and reduced stray fields when deactivated with respect to previous designs. Our proof-of-concept model consists to determine the anchorage of synthetic peptides in a bilayer enveloping magnetic beads by revealing their presence via fluorescently labeled immunoglobulins elicited against the native proteins of the said exposed peptides.

Published
2017

5. Magnetic tunnel transistor with a perpendicular Co/Ni multilayer sputtered on a Si/Cu(1 0 0) Schottky diode

Author

Christopher Vautrin, François Montaigne, Yuan Lu, Michel Hehn, Sébastien Petit-Watelot, S. Robert, G. Sala, O. Lenoble, Daniel Lacour, Xavier Devaux, Institut Jean Lamour (IJL), Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), IMPACT N4S, ANR-15-IDEX-04-LUE,LUE,Lorraine Université d'Excellence(2016), Université de Lorraine (UL)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), and ANR-15-IDEX-0004,LUE,Isite LUE(2015)

Subjects
Materials science, Acoustics and Ultrasonics, Schottky barrier, Analytical chemistry, Schottky diode, 02 engineering and technology, Substrate (electronics), 021001 nanoscience & nanotechnology, Condensed Matter Physics, 01 natural sciences, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, chemistry.chemical_compound, Nuclear magnetic resonance, Hydrofluoric acid, chemistry, [PHYS.COND.CM-GEN]Physics [physics]/Condensed Matter [cond-mat]/Other [cond-mat.other], 0103 physical sciences, Texture (crystalline), 010306 general physics, 0210 nano-technology, Anisotropy, Layer (electronics), Quantum tunnelling, ComputingMilieux_MISCELLANEOUS
Abstract

We have studied a magnetic tunnel transistor (MTT) structure based on a MgO tunnelling barrier emitter and a [Co/Ni]5/Cu multilayer base on a Si (0 0 1) substrate. Evident links between the Schottky barrier preparation techniques and the properties of perpendicular magnetic anisotropy (PMA) in the [Co/Ni] multilayer have been revealed by combined x-ray diffraction and magnetometry analyses. The Si surface treated by hydrofluoric acid (HF) is found to favour a Cu [1 0 0] texture growth which is detrimental to the [Co/Ni]5 PMA properties. However, a Ta layer insertion can restore the [1 1 1] texture required for the PMA appearance. By carefully engineering the base crystallographic texture structure, we obtain both a good quality of Schottky barrier and PMA property; a magneto-current ratio of 162% has been measured for MTTs with a spin-valve base composed of one magnetic layer having in-plane anisotropy and another one with out-of-plane anisotropy.

Published
2016

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