标题：Electrical Control of Perpendicular Magnetic Anisotropy and Spin-Orbit Torque-Induced Magnetization Switching
作者：Huang, Qikun; Dong, Yanan; Zhao, Xiaonan; Wang, Jing; Chen, Yanxue; Dai, Lihui; Dai, Ying; Dai, Youyong; Yan, Shishen; Tian, Yufeng
作者机构：[Huang, Qikun; Dong, Yanan; Zhao, Xiaonan; Wang, Jing; Chen, Yanxue; Dai, Lihui; Dai, Ying; Dai, Youyong; Yan, Shishen; Tian, Yufeng] Shandong Univ, S 更多
通讯作者地址：[Tian, YF]Shandong Univ, Sch Phys, State Key Lab Crystal Mat, Jinan 250100, Shandong, Peoples R China.
来源：ADVANCED ELECTRONIC MATERIALS
关键词：exchange coupling; oxygen ion migration; perpendicular magnetic; anisotropy; spin-orbit torque
摘要：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.