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- Title
Electrical Control of Perpendicular Magnetic Anisotropy and Spin‐Orbit Torque‐Induced Magnetization Switching.
- Authors
Huang, Qikun; Dong, Yanan; Zhao, Xiaonan; Wang, Jing; Chen, Yanxue; Bai, Lihui; Dai, Ying; Dai, Youyong; Yan, Shishen; Tian, Yufeng
- Abstract
Voltage‐driven oxygen ion migration in ferromagnetic metal/oxide heterostructures offers a highly effective means to tailor emergent interfacial functionalities. In heterojunctions with a core structure of Pt/Co/CoO/TiO2 (TaOx), it is demonstrated that exchange coupling of magnetic moments across the Co/CoO interface provides an extra source to stabilize the perpendicular magnetic anisotropy (PMA). Moreover, the strength of this interfacial coupling can be reversibly controlled through voltage‐driven oxygen ion migration at the Co/CoO interface, resulting in electrical‐field‐controllable PMA. In combination with the spin current generated from Pt, it is revealed that the spin‐orbit torque (SOT) switching of the perpendicular magnetization of Co can be turned ON/OFF by electrical field. Tunable PMA and SOT switching makes heavy metal/ferromagnetic metal/antiferromagnetic oxide heterojunctions a promising candidate to future voltage‐controlled, ultralow‐power, and high‐density spintronics devices.
- Subjects
PERPENDICULAR magnetic anisotropy; MAGNETIC control; MAGNETIZATION; FERROMAGNETIC materials; MAGNETIC moments; ION migration &; velocity
- Publication
Advanced Electronic Materials, 2020, Vol 6, Issue 3, p1
- ISSN
2199-160X
- Publication type
Article
- DOI
10.1002/aelm.201900782