Direct observation of domain-wall configurations transformed by spin currents.
Direct observations of current-induced domain-wall propagation by spin-polarized scanning electron microscopy are reported. Current pulses move head-to-head as well as tail-to-tail walls in submicrometer Fe20Ni80 wires in the direction of the electron flow, and a decay of the wall velocity with the number of injected current pulses is observed. High-resolution images of the domain walls reveal that the wall spin structure is transformed from a vortex to a transverse configuration with subsequent pulse injections. The change in spin structure is directly correlated with the decay of the velocity.
Kläui
M
M
Fachbereich Physik, Universität Konstanz, Universitätsstrasse 10, D-78457 Konstanz, Germany.
Jubert
P-O
PO
Allenspach
R
R
Bischof
A
A
Bland
J A C
JA
Faini
G
G
Rüdiger
U
U
Vaz
C A F
CA
Vila
L
L
Vouille
C
C