title: Direct imaging of stochastic domain-wall motion driven by nanosecond current pulses.
abstract: Magnetic transmission x-ray microscopy is used to directly visualize the influence of a spin-polarized current on domain walls in curved permalloy wires. Pulses of nanosecond duration and of high current density up to 1.0x10(12) A/m(2) are used to move and to deform the domain wall. The current pulse drives the wall either undisturbed, i.e., as composite particle through the wire, or causes structural changes of the magnetization. Repetitive pulse measurements reveal the stochastic nature of current-induced domain-wall motion.
authors.affiliation: Institut für Angewandte Physik und Zentrum für Mikrostrukturforschung, Universität Hamburg, Jungiusstrasse 11, 20355 Hamburg, Germany. meier@physnet.uni-hamburg.de
authors.forename: Guido
authors.initials: G
authors.lastname: Meier
authors.forename: Markus
authors.initials: M
authors.lastname: Bolte
authors.forename: René
authors.initials: R
authors.lastname: Eiselt
authors.forename: Benjamin
authors.initials: B
authors.lastname: Krüger
authors.forename: Dong-Hyun
authors.initials: DH
authors.lastname: Kim
authors.forename: Peter
authors.initials: P
authors.lastname: Fischer