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Détection mécanique de la résonance ferromagnétique

Abstract : This thesis is concerned with the study of a new experimental tool for the investigation of magnetization dynamics in magnetic nanostructures. The technique, ferro-Magnetic Resonance Force Microscopy (f-MRFM), is inspired by scanning probe methods and it characterizes Ferromagnetic Resonance (FMR) by means of a mechanical measurement. An original f-MRFM experimental setup was built. Its capabilities have been characterized by the study of a disk-shaped magnetic garnet sample, 160 microm. in diameter. The results demonstrate a sensitivity and a spectral resolution well suited for the study of individual microscopic samples. They also give us the optimization path towards either higher sensitivity or better spatial resolution for magnetic excitations imaging. Moreover, quantitative measurement of FMR can be obtained. This capability is used to perform a direct measurement of the longitudinal relaxation time T1.
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https://tel.archives-ouvertes.fr/tel-00003970
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Submitted on : Tuesday, January 20, 2004 - 5:24:11 PM
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Vincent Charbois. Détection mécanique de la résonance ferromagnétique. Matière Condensée [cond-mat]. Université Paris-Diderot - Paris VII, 2003. Français. ⟨tel-00003970⟩

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