Spinmotive force with static and uniform magnetization induced by a time-varying electric field

電場によるスピン起電力

山根 結太; 家田 淳一   ; 前川 禎通

Yamane, Yuta; Ieda, Junichi; Maekawa, Sadamichi

A new spinmotive force is predicted in ferromagnets with spin-orbit coupling. By extending the theory of spinmotive force, we show that a time-varying electric field can induce a spinmotive force with static and uniform magnetization. This spinmotive has two advantages; it can be detected free from the inductive voltage owing to the absence of dynamical magnetization, and it can be tuned by electric fields. To observe the effect, we propose two experimental setups: Electric voltage measurement in a single ferromagnet and spin injection from a ferromagnet into an attached nonmagnetic conductor.