论文标题
垂直磁性磁盘的旋转轨道的电场控制，带有cofeb/mgo膜
Electric-field control of spin-orbit torques in perpendicularly magnetized W/CoFeB/MgO films
论文作者
论文摘要
通过电场控制磁力，为设计子孙后代的节能信息技术提供了一种非常有吸引力的观点。在这里，我们证明，垂直磁化的COFEB膜中电流诱导的自旋轨道的大小可以通过电场产生的压电菌株来调节，甚至可以增加。使用理论计算，我们发现自旋轨道耦合，晶体对称性和轨道极化的微妙相互作用是观察到的自旋轨道扭矩的应变依赖性的核心。我们的结果为整合两种能源有效的自旋操作方法，电场诱导的应变和电流诱导的磁化磁化开关的途径开辟了道路，从而实现了新型的设备概念。
Controlling magnetism by electric fields offers a highly attractive perspective for designing future generations of energy-efficient information technologies. Here, we demonstrate that the magnitude of current-induced spin-orbit torques in thin perpendicularly magnetized CoFeB films can be tuned and even increased by electric field generated piezoelectric strain. Using theoretical calculations, we uncover that the subtle interplay of spin-orbit coupling, crystal symmetry, and orbital polarization is at the core of the observed strain dependence of spin-orbit torques. Our results open a path to integrating two energy efficient spin manipulation approaches, the electric field-induced strain and the current-induced magnetization switching, thereby enabling novel device concepts.
