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Phys Rev Lett. 2004 Aug 13;93(7):077207. Epub 2004 Aug 12.

Fourier transform imaging of spin vortex eigenmodes.

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1
Institut für Experimentelle und Angewandte Physik, Universität Regensburg, Universitätsstrasse 31, 93040 Regensburg, Germany.

Erratum in

  • Phys Rev Lett. 2004 Sep 17;93(12):129902.

Abstract

Thin-circular lithographically defined magnetic elements with a spin vortex configuration are excited with a short perpendicular magnetic field pulse. We report the first images of excited magnetic eigenmodes up to third order, obtained by means of a phase sensitive Fourier transform imaging technique. Both axially symmetric and symmetry breaking azimuthal eigenmodes are observed. We observe strong oscillations of the magnetization in the central part of the magnetic elements. The experimental data are in good agreement with micromagnetic simulations.

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