Microscopic Theory of Current-Spin Interaction in Ferromagnets

Details Microscopic Theory of Current-Spin Interaction in Ferromagnets Microscopic Theory of Current-Spin Interaction in Ferromagnets

2009-12-09

arxiv.org/abs/0912.1676v1

Proceedings of ISQM-Tokyo '08 (World Scientific, 2009)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Written in December 2008, published in July 2009

Scientific paper

Interplay between magnetization dynamics and electric current in a conducting ferromagnet is theoretically studied based on a microscopic model calculation. First, the effects of the current on magnetization dynamics (spin torques) are studied with special attention to the "dissipative" torques arising from spin-relaxation processes of conduction electrons. Next, an analysis is given of the "spin motive force", namely, a spin-dependent 'voltage' generation due to magnetization dynamics, which is the reaction to spin torques. Finally, an attempt is presented of a unified description of these effects.

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