title: Dependence of magnetic domain-wall motion on a fast changing current.
abstract: A dependence of current-induced domain-wall motion in nanowires on the temporal shape of current pulses is observed. The results show that the motion of the wall is amplified for alterations of the current on a time scale smaller than the intrinsic time scale of the domain wall which is a few nanoseconds in permalloy. This effect arises from an additional force on the wall by the spin-transfer torque due to a fast changing current and improves the efficiency of domain-wall motion. The observations provide an understanding for the efficient domain-wall motion with nanosecond current pulses.
authors.affiliation: Institut für Angewandte Physik und Zentrum für Mikrostrukturforschung, Universität Hamburg, Jungiusstrasse 11, 20355 Hamburg, Germany. lbocklag@physnet.uni-hamburg.de
authors.forename: Lars
authors.initials: L
authors.lastname: Bocklage
authors.forename: Benjamin
authors.initials: B
authors.lastname: Krüger
authors.forename: Toru
authors.initials: T
authors.lastname: Matsuyama
authors.forename: Markus
authors.initials: M
authors.lastname: Bolte
authors.forename: Ulrich
authors.initials: U
authors.lastname: Merkt
authors.forename: Daniela
authors.initials: D
authors.lastname: Pfannkuche
authors.forename: Guido
authors.initials: G
authors.lastname: Meier