Wednesday, June 13, 2012

1206.2561 (Satoru Emori et al.)

Interfacial current-induced torques in Pt/Co/GdOx    [PDF]

Satoru Emori, David C. Bono, Geoffrey S. D. Beach
Current-driven domain wall (DW) motion is investigated in Pt/Co/GdOx nanostrips with perpendicular magnetic anisotropy. Measurements of the propagation field and the energy barrier for thermally activated DW motion reveal a large current-induced torque equivalent to an out-of-plane magnetic field of ~60 Oe per 10^11 A/m^2. This same field-to-current scaling is shown to hold in both the slow thermally activated and fast near-flow regimes of DW motion. The current-induced torque decreases with 4 {\AA} of Pt decorating the Co/GdOx interface and vanishes entirely with Pt replacing GdOx, suggesting that the Co/GdOx interface contributes directly to highly efficient current-driven DW motion.
View original: http://arxiv.org/abs/1206.2561

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