Spin-Orbit-Torque Switching Mediated by an Antiferromagnetic Insulator

Author(s)
Wang, Hailong; Finley, Joseph; Zhang, Pengxiang; Han, Jiahao; Hou, Justin T; ... Show more
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Abstract
© 2019 American Physical Society. We report the observation of antiferromagnetic insulator-mediated spin-orbit-torque switching in Pt/NiO/Co1-xTbx heterostructures. By measuring the current-induced shift in the magnetic hysteresis loops and the second-harmonic anomalous Hall resistance, we quantitatively determine the spin-orbit-torque efficiency in Pt/NiO/Co1-xTbx samples with different NiO thicknesses, uncovering a systematic evolution of the magnetic switching behavior. The measured spin-orbit-torque efficiency is enhanced in the low NiO thickness regime (1-2 nm), highlighting the efficient spin manipulation across a disordered antiferromagnetic insulator.
Date issued
2019
URI
https://hdl.handle.net/1721.1/136218
Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Journal
Physical Review Applied
Publisher
American Physical Society (APS)
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