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. 2015 Oct 1;5:14668. doi: 10.1038/srep14668

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(a) The magnetization direction detected by AHE measurement after each pulsed current of 10μs while sweeping current. The in-plane magnetic field H_x of 200 Oe is continuously applied during the measurement. Each line is independent AHE measurement as a function of H_z, which is designated in the top axis. The arrows indicate the critical current density for magnetization switching. (b) The inverse ratio of critical current density (J_c) to magnetic anisotropy (H_k) as a function of the W thickness, which is corresponded to the SOT-switching efficiency or the magnitude of SOT.