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Élaboration et Caractérisation de Matériaux Ferromagnétiques Doux − Modélisation de Couches Magnétiques Inhomogènes

Abstract : The aim of this work is to product and characterize some soft ferromagnetic materials : nanocrystallized Finemet-based glass-coated microwires fabricated using a Taylor-Ulitovsky process and amorphous Co-based thin films deposited by magnetron sputtering. In a first part, the influence of the structural order for the nanocrystallized glass-coated microwires and the influence of the composition for the thin magnetic films on the magnetic properties has been studied. In a second part, the various origins of the magnetization dispersion of thin layers deposited continuously on a transported polymeric substrate has been listed. A method has been proposed to estimate both angular and intensity anisotropy distribution in depth. The magnetic susceptibility calculation taking into account the experimental magnetization dispersion is achieved in the framework of n-macrospins approximation without the exchange interaction. In addition, the static and dynamic magnetic behavior of both a bilayer and a multilayer with crossed magnetic anisotropies has been reproduced by a dedicated 1D micromagnetic model (with the exchange energy). In particular, a detailed study of such a bilayer has been investigated : static and dynamic magnetization, magnetic domain structure, coupled dynamically magnetization and characterization of the magnetization distribution in depth.
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Contributor : Vincent Dubuget <>
Submitted on : Monday, May 3, 2010 - 2:15:13 PM
Last modification on : Tuesday, July 9, 2019 - 1:24:46 AM
Long-term archiving on: : Thursday, September 16, 2010 - 1:21:25 PM


  • HAL Id : tel-00480050, version 1



Vincent Dubuget. Élaboration et Caractérisation de Matériaux Ferromagnétiques Doux − Modélisation de Couches Magnétiques Inhomogènes. Matière Condensée [cond-mat]. Université François Rabelais - Tours, 2010. Français. ⟨tel-00480050⟩



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