Phys. Rev. Lett. 94, 217204 (2005) [4 pages]Quantitative Analysis of Magnetic Excitations in Landau Flux-Closure Structures Using Synchrotron-Radiation MicroscopyReceived 16 December 2004; published 2 June 2005 We have measured the excitation spectrum of six micron magnetic squares using x-ray magnetic circular dichroism. We observe all three excitations expected in a Landau flux-closure pattern. High temporal and spatial resolution allows quantitative analysis of the excitations. A short magnetic in plane pulse excites the magnetic element and we observe precessional motion of the magnetization within the domains as well as a domain wall mode and vortex motion. The vortex moves perpendicular to the excitation field and relaxes without showing a circulating orbit. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.94.217204
DOI:
10.1103/PhysRevLett.94.217204
PACS:
75.40.Gb, 75.60.-d, 75.75.+a
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