title: Vortex core switching by coherent excitation with single in-plane magnetic field pulses.
abstract: 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.
authors.affiliation: Max-Planck-Institut für Metallforschung, 70569 Stuttgart, Germany. mweigand@mf.mpg.de
authors.forename: Markus
authors.initials: M
authors.lastname: Weigand
authors.forename: Bartel
authors.initials: B
authors.lastname: Van Waeyenberge
authors.forename: Arne
authors.initials: A
authors.lastname: Vansteenkiste
authors.forename: Michael
authors.initials: M
authors.lastname: Curcic
authors.forename: Vitalij
authors.initials: V
authors.lastname: Sackmann
authors.forename: Hermann
authors.initials: H
authors.lastname: Stoll
authors.forename: Tolek
authors.initials: T
authors.lastname: Tyliszczak
authors.forename: Konstantine
authors.initials: K
authors.lastname: Kaznatcheev
authors.forename: Drew
authors.initials: D
authors.lastname: Bertwistle
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