Spin Hall Current and Spin-transfer Torque in Ferromagnetic Metal

Details Spin Hall Current and Spin-transfer Torque in Ferromagnetic Metal Spin Hall Current and Spin-transfer Torque in Ferromagnetic Metal

2009-05-28

arxiv.org/abs/0905.4561v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, Proceedings of the International Conference on Magnetism, submitted to J. Phys: Conference Series

Scientific paper

We theoretically examine the spin-transfer torque in the presence of spin-orbit interaction (SOI) at impurities in a ferromagnetic metal on the basis of linear response theory. We obtained, in addition to the usual spin-transfer torque, a new contributioin $\sim {\bm j}_{\rm SH}^{\phantom{\dagger}} \cdot \nabla {\bm n}$ in the first order in SOI, where ${\bm j}_{\rm SH}^{\phantom{\dagger}}$ is the spin Hall current driven by an external electric field. This is a reaction to inverse spin Hall effect driven by spin motive force in a ferromagnet.

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