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arXiv · 1206.2561

Interfacial current-induced torques in Pt/Co/GdOx

Satoru Emori·David C. Bono·Geoffrey S. D. Beach
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Abstract

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 Å 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.

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Satoru Emori, David C. Bono, Geoffrey S. D. Beach. 2012-06-30. Interfacial current-induced torques in Pt/Co/GdOx. https://doi.org/10.1063/1.4737899

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