Kyoung-Whan Kim, Jung-Hwan Moon, Kyung-Jin Lee, Hyun-Woo Lee
Magnetization dynamics in a ferromagnet can induce a spin-dependent electric
field through spin motive force. Spin current generated by the spin-dependent
electric field can in turn modify the magnetization dynamics through
spin-transfer torque. Whereas this feedback effect is negligibly weak in
conventional situations, we report that the spin-dependent electric field in
strong Rashba spin-orbit coupling systems can be orders of magnitude stronger
and generate spin current large enough to modify the magnetization dynamics
significantly. This effect should be relevant for device applications based on
ultrathin magnetic layers with strong Rashba spin-orbit coupling.
View original:
http://arxiv.org/abs/1202.1406
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