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Propagation et confinement d'ondes de spin dans les microstructures magnétiques

Abstract : In this thesis, ferromagnetic thin film elements have been studied on a small scale (µm) and at high frequencies (GHz). For
those studies, a microwave spectrometer based on the use of micro-antennae has been developed. It had been applied to
two different systems. In a first time, we have launched and detected spin waves in continuous films. This allowed us to
describe both the transduction process and the relaxation law for long wavelength spin waves. In a second time, we have
studied micrometer-wide stripe for which the magnetic ground state is inhomogeneous. The obtained microwave response
has been interpreted in terms of micromagnetic phase transitions and in terms of spin waves confinement.
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Contributor : Marc Gingold Connect in order to contact the contributor
Submitted on : Monday, November 18, 2002 - 11:01:01 AM
Last modification on : Tuesday, December 14, 2021 - 3:19:00 AM
Long-term archiving on: : Tuesday, September 11, 2012 - 6:35:26 PM


  • HAL Id : tel-00001976, version 1



Matthieu Bailleul. Propagation et confinement d'ondes de spin dans les microstructures magnétiques. Matière Condensée [cond-mat]. Ecole Polytechnique X, 2002. Français. ⟨tel-00001976⟩



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