Direct observation of domain-wall configurations transformed by spin currents -: art. no. 026601

被引:298
作者
Kläui, M
Jubert, PO [1 ]
Allenspach, R
Bischof, A
Bland, JAC
Faini, G
Rüdiger, U
Vaz, CAF
Vila, L
Vouille, C
机构
[1] IBM Corp, Zurich Res Lab, CH-8803 Ruschlikon, Switzerland
[2] Univ Konstanz, Fachbereich Phys, D-78457 Constance, Germany
[3] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England
[4] CNRS, Lab Photon & Nanostruct, F-91460 Marcoussis, France
[5] Univ Paris 11, Phys Solides Lab, F-91405 Orsay, France
关键词
D O I
10.1103/PhysRevLett.95.026601
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
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.
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页数:4
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