Vortex core switching by coherent excitation with single in-plane magnetic field pulses.
The response of magnetic vortex cores to subnanosecond in-plane magnetic field pulses was studied by time-resolved x-ray microscopy. Vortex core reversal was observed and the switching events were located in space and time. This revealed a mechanism of coherent excitation by the leading and trailing edges of the pulse, lowering the field amplitude required for switching. The mechanism was confirmed by micromagnetic simulations and can be understood in terms of gyration around the vortex equilibrium positions, displaced by the applied field.
Weigand
Markus
M
Max-Planck-Institut für Metallforschung, 70569 Stuttgart, Germany. mweigand@mf.mpg.de
Van Waeyenberge
Bartel
B
Vansteenkiste
Arne
A
Curcic
Michael
M
Sackmann
Vitalij
V
Stoll
Hermann
H
Tyliszczak
Tolek
T
Kaznatcheev
Konstantine
K
Bertwistle
Drew
D
Woltersdorf
Georg
G
Back
Christian H
CH
Schütz
Gisela
G