Prediction of giant spin motive force due to Rashba spin-orbit coupling

Magnetization dynamics in a ferromagnet can induce a spin-dependent electric field through a spin motive force. Spin current generated by the spin-dependent electric field can in turn modify the magnetization dynamics through spin-transfer torque. While this feedback effect is usually weak and thus...

Full description

Saved in:
Bibliographic Details
Published inPhysical review letters Vol. 108; no. 21; p. 217202
Main Authors Kim, Kyoung-Whan, Moon, Jung-Hwan, Lee, Kyung-Jin, Lee, Hyun-Woo
Format Journal Article
LanguageEnglish
Published United States 23.05.2012
Online AccessGet more information

Cover

More Information
Summary:Magnetization dynamics in a ferromagnet can induce a spin-dependent electric field through a spin motive force. Spin current generated by the spin-dependent electric field can in turn modify the magnetization dynamics through spin-transfer torque. While this feedback effect is usually weak and thus ignored, we predict that in Rashba spin-orbit coupling systems with a large Rashba parameter α(R), the coupling generates the spin-dependent electric field [±(α(R)m(e)/eħ)(z[over ^]×∂m/∂t)], which can be 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.
ISSN:1079-7114
DOI:10.1103/physrevlett.108.217202