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8 results on '"Nale, M."'

1. Thermal expansion of LaFeAsO: Evidence for high-temperature fluctuations

Author

Wang, L., Kohler, U., Leps, N., Kondrat, A., Nale, M., Gasparini, A., de Visser, A., Behr, G., Hess, C., Klingeler, R., and Buchner, B.

Subjects
Condensed Matter - Superconductivity
Abstract

We present measurements of the thermal expansion coefficient alpha of polycrystalline LaFeAsO1-xFx (x <= 0.1). The magnetic and structural transitions of the samples with x <= 0.04 give rise to large anomalies in alpha(T), while the onset of superconductivity in the crystals with x >= 0.05 is not resolved. Above the structural transition, the thermal expansion coefficient of LaFeAsO is significantly enhanced. This is attributed to fluctuations, which also affect the electrical transport properties of the compound. The complete absence of these fluctuations in the superconducting samples even for x = 0.05 is taken as evidence for an abrupt first-order type of suppression of the structural and magnetic transitions upon F doping., Comment: 6 pages, submitted to Phys. Rev. B

Published
2009
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4. Thermal expansion of <tex>LaFeAsO_{1-x}F_{x}$</tex>: evidence for high-temperature fluctuations

Author

Wang, L., Koehler, U., Leps, N., Kondrat, A., Nale, M., Gasparini, Alessia, de Visser, A., Behr, G., Hess, C., Klingeler, R., and Buechner, B.

Subjects
Condensed Matter::Superconductivity, Physics
Abstract

We present measurements of the thermal expansion coefficient alpha of polycrystalline LaFeAsO1-xFx (x < 0.1). The magnetic and structural transitions of the samples with x < 0.04 give rise to large anomalies in alpha(T) while the onset of superconductivity in the crystals with x >= 0.05 is not resolved. Above the structural transition, the thermal expansion coefficient of LaFeAsO is significantly enhanced. This is attributed to fluctuations, which also affect the electrical transport properties of the compound. The complete absence of these fluctuations in the superconducting samples even for x=0.05 is taken as evidence for an abrupt first-order type of suppression of the structural and magnetic transitions upon F doping.

Published
2009

5. Thermal expansion of LaFeAsO1-xFx: evidence for high temperature fluctuations

Author

Wang, L., Köhler, U., Leps, N., Kondrat, A., Nale, M., Gasparini, A., de Visser, A., Behr, G., Hess, C., Klingeler, R., Büchner, B., and Hard Condensed Matter (WZI, IoP, FNWI)

Subjects
Condensed Matter::Superconductivity
Abstract

We present measurements of the thermal expansion coefficient α of polycrystalline LaFeAsO1−xFx (x≤0.1). The magnetic and structural transitions of the samples with x≤0.04 give rise to large anomalies in α(T) while the onset of superconductivity in the crystals with x≥0.05 is not resolved. Above the structural transition, the thermal expansion coefficient of LaFeAsO is significantly enhanced. This is attributed to fluctuations, which also affect the electrical transport properties of the compound. The complete absence of these fluctuations in the superconducting samples even for x=0.05 is taken as evidence for an abrupt first-order type of suppression of the structural and magnetic transitions upon F doping

Published
2009

7. Cathodic protection modelling of a cover and uncover steel in seawater environment following by electric signature simulations of a ship

Author

Minola, M., Roche, V., J-C, Leprêtre, Goeau, C., Chadebec, O., L-L, Rouve, Olivier Pinaud, Nale, M., Electrochimie Interfaciale et Procédés (EIP ), Laboratoire d'Electrochimie et de Physico-chimie des Matériaux et des Interfaces (LEPMI ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut de Chimie du CNRS (INC)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut de Chimie du CNRS (INC)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Matériaux Interfaces ELectrochimie (MIEL ), DGA TN F, 1) DGA TN F-29200 Brest, Laboratoire de Génie Electrique de Grenoble (G2ELab), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), G2Elab-Modèles, Méthodes et Méthodologies Appliqués au Génie Electrique (G2Elab-MAGE), Laboratoire de Génie Electrique de Grenoble (G2ELab ), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), and Université Grenoble Alpes (UGA)

Subjects
[SPI.NRJ]Engineering Sciences [physics]/Electric power, ComputingMilieux_MISCELLANEOUS
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