Stability of spinmotive force in perpendicularly magnetized nanowires under high magnetic fields

垂直磁化細線におけるスピン起電力

山根 結太; 家田 淳一   ; 前川 禎通

Yamane, Yuta; Ieda, Junichi; Maekawa, Sadamichi

Spinmotive force induced by domain wall motion in perpendicularly magnetized nanowires is numerically demonstrated. We show that using nanowires with large magnetic anisotropy can lead to a high stability of spinmotive force under strong magnetic fields. We observe spinmotive force in the order of tens of V in a multilayered Co/Ni nanowire and several hundreds of V in a 1-ordered FePt nanowire; the latter is two orders of magnitude greater than that in permalloy nanowires reported previously. The narrow structure and low mobility of a domain wall under magnetic fields in perpendicularly magnetized nanowires permits downsizing of spinmotive force devices.