Polarization selective magnetic vortex dynamics and core reversal in rotating magnetic fields.
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.
Curcic
Michael
M
Max-Planck-Institut für Metallforschung, 70569 Stuttgart, Germany. curcic@mf.mpg.de
Van Waeyenberge
Bartel
B
Vansteenkiste
Arne
A
Weigand
Markus
M
Sackmann
Vitalij
V
Stoll
Hermann
H
Fähnle
Manfred
M
Tyliszczak
Tolek
T
Woltersdorf
Georg
G
Back
Christian H
CH
Schütz
Gisela
G