Spin-wave modes in Ni nanorod arrays studied by Brillouin light scattering

Andrei Stashkevich, Philippe Djemia, Paul Evans, Antony Murphy, William Hendren, Ron Atkinson, Robert Pollard, Anatoly Zayats, Gregory Chaboussant, Frédéric Ott

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40 Citations (Scopus)

Abstract

Dynamic magnetic properties of arrays of Ni nanorods with a low aspect ratio have been investigated. It has been shown that the spectra of spin-wave resonances localized on nanorods with a low aspect ratio typically feature the presence of zones with high density of states resulting in a characteristic two-peak pattern of Stokes and anti-Stokes lines of magneto-optical (MO) Brillouin light scattering with pronounced Stokes–anti-Stokes (S-AS) asymmetry. A simple theoretical model based on the analysis of the elliptic character of the polarization of the optical wave interacting with a dipole magnetostatic wave has been proposed. It has been shown that the S-AS asymmetry is due entirely to the asymmetry of the MO interaction efficiency with respect to time reversal of the magnetic precession in a magnon.
Original languageEnglish
JournalPhysical Review B (Condensed Matter)
Volume80
Issue number14
DOIs
Publication statusPublished - 2009

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