title: Polarization selective magnetic vortex dynamics and core reversal in rotating magnetic fields.
abstract: We report on the observation of magnetic vortex dynamics in response to rotating magnetic fields in submicron platelets. Unlike linear fields or spin polarized currents, which excite both vortex core polarization states, an in-plane rotating field can selectively excite one of the polarization states. We demonstrate by direct imaging with time-resolved scanning x-ray microscopy that the rotating field only excites the gyrotropic mode if the rotation sense of the field coincides with the vortex gyration sense and that such a field can selectively reverse the vortex polarization.
authors.affiliation: Max-Planck-Institut für Metallforschung, 70569 Stuttgart, Germany. curcic@mf.mpg.de
authors.forename: Michael
authors.initials: M
authors.lastname: Curcic
authors.forename: Bartel
authors.initials: B
authors.lastname: Van Waeyenberge
authors.forename: Arne
authors.initials: A
authors.lastname: Vansteenkiste
authors.forename: Markus
authors.initials: M
authors.lastname: Weigand
authors.forename: Vitalij
authors.initials: V
authors.lastname: Sackmann
authors.forename: Hermann
authors.initials: H
authors.lastname: Stoll
authors.forename: Manfred
authors.initials: M
authors.lastname: Fähnle
authors.forename: Tolek
authors.initials: T
authors.lastname: Tyliszczak
authors.forename: Georg
authors.initials: G
authors.lastname: Woltersdorf
authors.forename: Christian H
authors.initials: CH
authors.lastname: Back
authors.forename: Gisela
authors.initials: G
authors.lastname: Schütz