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

被引：71
|
作者：
Emori, Satoru [1 ]
Bauer, Uwe [1 ]
Woo, Seonghoon [1 ]
Beach, Geoffrey S. D. [1 ]
机构：
[1] MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA
来源：
APPLIED PHYSICS LETTERS | 2014年 / 105卷 / 22期
基金：
美国国家科学基金会;
关键词：
DOMAIN-WALLS; LAYER;
D O I：
10.1063/1.4903041
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We report on large modifications of current-induced spin-orbit torques in a gated Pt/Co/Gd-oxide microstrip due to voltage-driven O-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 similar to 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. (C) 2014 AIP Publishing LLC.
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页数：4
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