Spatially Resolved Dynamics of Localized Spin-Wave Modes in Ferromagnetic Wires

Details Spatially Resolved Dynamics of Localized Spin-Wave Modes in Ferromagnetic Wires Spatially Resolved Dynamics of Localized Spin-Wave Modes in Ferromagnetic Wires

2002-06-30

arxiv.org/abs/cond-mat/0207022v1

Physics

Condensed Matter

Materials Science

10 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.89.277201

We have observed localized spin-wave modes in individual thin-film ferromagnetic wires using time-resolved Kerr microscopy as a micron-scale spectroscopic probe. The localization is due to the partial demagnetization of a wire when an external field is applied in the plane of the film and perpendicular to the long axis of the wire. Spatially-resolved spectra demonstrate the existence of distinct modes at the edges of a rectangular wire. Spectral images clearly show the crossover of the two edge modes into a single mode in low applied fields, in agreement with the results of micromagnetic simulations.

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