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 (TaO_x), 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.

中文翻译：

---

垂直磁各向异性和自旋轨道转矩感应磁化开关的电气控制

电压驱动的氧离子在铁磁金属/氧化物异质结构中的迁移提供了一种高度有效的方法，可调整新兴的界面功能。在具有Pt / Co / CoO / TiO ₂（TaO _x），证明了Co / CoO界面上的磁矩交换耦合为稳定垂直磁各向异性（PMA）提供了额外的来源。此外，可以通过电压驱动的氧离子在Co / CoO界面上的迁移来可逆地控制这种界面耦合的强度，从而产生可电场控制的PMA。结合从Pt产生的自旋电流，可以看出，通过电场可以打开/关闭Co的垂直磁化的自旋轨道转矩（SOT）切换。可调谐的PMA和SOT开关使重金属/铁磁性金属/反铁磁性氧化物异质结成为未来电压控制，超低功耗和高密度自旋电子器件的有前途的候选者。