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Interactions of spin waves with a magnetic vortex

J. P. Park, P. A. Crowell

cond-mat.mtrl-sciarXiv:cond-mat/0508597

Abstract

We have investigated azimuthal spin-wave modes in magnetic vortex structures using time-resolved Kerr microscopy. Spatially resolved phase and amplitude spectra of ferromagnetic disks with diameters from 5 μm down to 500 nm reveal that the lowest order azimuthal spin wave mode splits into a doublet as the disk size decreases. We demonstrate that the splitting is due to the coupling between spin waves and the gyrotropic motion of the vortex core.

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