Interfacial current-induced torques in Pt/Co/GdOx
Author(s)Emori, Satoru; Bono, David C.; Beach, Geoffrey Stephen
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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[superscript 11] A/m[superscript 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.
DepartmentMassachusetts Institute of Technology. Department of Materials Science and Engineering
Applied Physics Letters
American Institute of Physics
Emori, Satoru, David C. Bono, and Geoffrey S. D. Beach. Interfacial Current-induced Torques in Pt/Co/GdOx. Applied Physics Letters 101, no. 4 (2012): 042405. © 2012 American Institute of Physics.
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