Large voltage-induced modification of spin-orbit torques in Pt/Co/GdOx
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Beach_Large voltage.pdf
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Author(s)
Emori, Satoru
Bauer, Uwe
Woo, Seonghoon
Beach, Geoffrey Stephen
Date Issued
December 2014
Journal
Applied Physics Letters
Publisher
American Institute of Physics (AIP)
Citation
Emori, Satoru, Uwe Bauer, Seonghoon Woo, and Geoffrey S. D. Beach. “Large Voltage-Induced Modification of Spin-Orbit Torques in Pt/Co/GdOx.” Applied Physics Letters 105, no. 22 (December 1, 2014): 222401. © 2014 AIP Publishing LLC
Version
Final published version
Abstract
We report on large modifications of current-induced spin-orbit torques in a gated Pt/Co/Gd-oxide microstrip due to voltage-driven O[superscript 2]−migration. The Slonczewski-like and field-like torques are quantified using a low-frequency harmonic technique based on the polar magneto-optical Kerr effect. Voltage-induced oxidation of Co enhances the Slonczewski-like torque by as much as an order of magnitude and simultaneously reduces the anisotropy energy barrier by a factor of ~5. Such magneto-ionic tuning of interfacial spin-orbit effects may significantly enhance the efficiency of magnetization switching and provide additional degrees of freedom in spintronic devices.
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1063/1.4903041
