期刊论文详细信息
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS 卷:321
Magneto-optical and micromagnetic simulation study of the current-driven domain wall motion in ferromagnetic (Ga,Mn) As
Article
Wang, K. Y.1  Irvine, A. C.2  Campion, R. P.3  Foxon, C. T.3  Wunderlich, J.1  Williams, D. A.1  Gallagher, B. L.3 
[1] Hitachi Cambridge Lab, Cambridge CB3 0HE, England
[2] Univ Cambridge, Cavendish Lab, Microelect Res Ctr, Cambridge CB3 0HE, England
[3] Univ Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, England
关键词: Spin-torque;    Magneto-optical;    Micromagnetic;   
DOI  :  10.1016/j.jmmm.2008.03.022
来源: Elsevier
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【 摘 要 】

We have studied current-driven domain wall motion in modified Ga0.95Mn0.05 As Hall bar structures with perpendicular anisotropy by using spatially resolved polar magneto-optical Kerr effect microscopy and micromagnetic simulation. Regardless of the initial magnetic configuration, the domain wall propagates in the opposite direction to the current with critical current of 1-2 x 10(5) A/cm(2). Considering the spin-transfer torque term as well as various effective magnetic field terms, the micromagnetic simulation results are consistent with the experimental results. Our simulated and experimental results suggest that the spin-torque rather than Oersted field is the reason for current-driven domain wall motion in this material. (C) 2008 Elsevier B.V. All rights reserved.

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