Dependence of magnetic domain-wall motion on a fast changing current.
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.
Bocklage
Lars
L
Institut für Angewandte Physik und Zentrum für Mikrostrukturforschung, Universität Hamburg, Jungiusstrasse 11, 20355 Hamburg, Germany. lbocklag@physnet.uni-hamburg.de
Krüger
Benjamin
B
Matsuyama
Toru
T
Bolte
Markus
M
Merkt
Ulrich
U
Pfannkuche
Daniela
D
Meier
Guido
G