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 spinorbit 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 α and the non-adiabaticity parameter β.
Bibliographical noteFunding Information:
We thank Myung-Joong Hwang for helpful comments on the manuscript. This work was supported by Mid-career Researcher Program through NRF grant funded by the MEST( 2009-0084542, 2009-0083723, 2010-0014109, 2010-0023798 ), the Korea Science and Engineering Foundation (KOSEF) through the National Research Laboratory Program funded by the Ministry of Science and Technology ( No. M10600000198-06J0000-19810 ), the Degree of Research Center(DRC) Program funded by the Korea Research Council of Fundamental Science and Technology(KRCF), POSCO and BK21.
- Domain wall motion
- Spinorbit coupling
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics