Phys. Rev. Lett. 95, 026601 (2005) [4 pages]Direct Observation of Domain-Wall Configurations Transformed by Spin CurrentsReceived 15 November 2004; revised 15 April 2005; published 8 July 2005 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. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.95.026601
DOI:
10.1103/PhysRevLett.95.026601
PACS:
72.25.Ba, 75.60.Ch, 75.75.+a
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