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Rashba spin-orbit coupling effects on a current-induced domain wall motion

Authors
Ryu, JisuSeo, Soo-ManLee, Kyung-JinLee, Hyun-Woo
Issue Date
4월-2012
Publisher
ELSEVIER SCIENCE BV
Keywords
Domain wall motion; Spin-orbit coupling
Citation
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, v.324, no.7, pp.1449 - 1452
Indexed
SCIE
SCOPUS
Journal Title
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
Volume
324
Number
7
Start Page
1449
End Page
1452
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/108844
DOI
10.1016/j.jmmm.2011.12.010
ISSN
0304-8853
Abstract
A current-induced domain wall motion in magnetic nanowires with a strong structural inversion asymmetry [I.M. Miron, T. Moore, H. Szambolics, L.D. Buda-Prejbeanu, S. Auffret, B. Rodmacq, S. Pizzini, J. Vogel, M. Bonfim, A. Schuhl, G. Gaudin, Nat. Mat. 10 (2011) 419] seems to have novel features such as the domain wall motion along the current direction or the delay of the onset of the Walker breakdown. In such a highly asymmetric system, the Rashba spin-orbit coupling (RSOC) may affect a domain wall motion. We studied theoretically the RSOC effects on a domain wall motion and found that the RSOC, indeed, can induce the domain wall motion along the current direction in certain situations. It also delays the Walker breakdown and for a strong RSOC, the Walker breakdown does not occur at all. The RSOC effects are sensitive to the magnetic anisotropy of nanowires and also to the ratio between the Gilbert damping parameter alpha and the non-adiabaticity parameter beta. (C) 2011 Elsevier B.V. All rights reserved.
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