Giant Spin Motive Force due to Rashba Spin-Orbit Coupling

Details Giant Spin Motive Force due to Rashba Spin-Orbit Coupling Giant Spin Motive Force due to Rashba Spin-Orbit Coupling

2012-02-07

arxiv.org/abs/1202.1406v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4+ pages, 2 figures

Scientific paper

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.

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