Large voltage-induced modification of spin-orbit torques in Pt/Co/GdOx

Author(s)
Emori, Satoru; Bauer, Uwe; Woo, Seonghoon; Beach, Geoffrey Stephen
Thumbnail
DownloadBeach_Large voltage.pdf (457.7Kb)
PUBLISHER_POLICY
Terms of use
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.
Metadata
Show full item record
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.
Date issued
2014-12
URI
http://hdl.handle.net/1721.1/101767
Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
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
ISSN
0003-6951
1077-3118
Collections