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

J. P. Park; P. Eames; D. M. Engebretson; J. Berezovsky; P. A. Crowell

doi:10.1103/PhysRevLett.89.277201

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

J. P. Park, P. Eames, D. M. Engebretson, J. Berezovsky, P. A. Crowell

Physics and Astronomy (Twin Cities)

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227 Scopus citations

Abstract

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 internal field profile present 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.

Original language	English (US)
Journal	Physical review letters
Volume	89
Issue number	27
DOIs	https://doi.org/10.1103/PhysRevLett.89.277201
State	Published - 2002

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AU - Berezovsky, J.

AU - Crowell, P. A.

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AB - 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 internal field profile present 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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Spatially Resolved Dynamics of Localized Spin-Wave Modes in Ferromagnetic Wires

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