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