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Quantitative analysis of magnetic excitations in Landau flux-closure structures using synchrotron-radiation microscopy

, : Quantitative analysis of magnetic excitations in Landau flux-closure structures using synchrotron-radiation microscopy. Physical Review Letters 94(21): 217204-217204

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.


PMID: 16090344

DOI: 10.1103/PhysRevLett.94.217204

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