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Excitations with negative dispersion in a spin vortex

URN to cite this document:
urn:nbn:de:bvb:355-epub-19230
DOI to cite this document:
10.5283/epub.1923
Buess, Matthias ; Knowles, T. ; Höllinger, Rainer ; Haug, Thomas ; Krey, Uwe ; Weiss, Dieter ; Pescia, D. ; Scheinfein, M. ; Back, Christian
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Date of publication of this fulltext: 05 Aug 2009 13:34


Abstract

Micron-sized ferromagnetic permalloy disks having an in-plane vortexlike configuration are excited by a fast-rise-time magnetic-field pulse perpendicular to the plane. The excited modes are imaged using time-resolved magneto-optic Kerr microscopy and Fourier transformation. Two types of modes are observed: modes with circular nodes and modes with diametric nodes. The frequency of the modes with ...

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