Quantitative analysis of magnetic excitations in Landau flux-closure structures using synchrotron-radiation microscopy.
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.
Raabe
J
J
Paul Scherrer Institut, CH-5232 Villigen, Switzerland. joerg.raabe@psi.ch
Quitmann
C
C
Back
C H
CH
Nolting
F
F
Johnson
S
S
Buehler
C
C