论文标题
WTE2/Ferromagnet异质结构在室温下在室温下垂直磁化的无现场自旋轨道诱导的扭矩转换
Field-free spin-orbit torque-induced switching of perpendicular magnetization at room temperature in WTe2/ferromagnet heterostructures
论文作者
论文摘要
自旋轨道扭矩（SOT）提供了一种实现电荷到旋转转换率并可以切换垂直磁化的有效方法，这对于设计新型的节能自旋器件至关重要。平面外SOT可以直接切换垂直磁化。令人鼓舞的是，最近报道了二维（2D）材料WTE2/Ferromagnet（FM）双层的无现场垂直磁化切换，但工作温度（200 K）低于室温。在这里，我们报告在WTE2/pt/co/pt多层膜上在室温下进行的无现场垂直磁化切换。受控实验证实，无场切换是由PT/CO/PT多层中产生的平面内反向阻尼SOT以及A轴WTE2薄膜中产生的平面外的。这项工作提供了一种潜在的方法，用于在室温下使用由二维材料制成的自旋设备。
Spin-orbit torque (SOT) provides an efficient way to achieve charge-to-spin conversion and can switch perpendicular magnetization, which is essential for designing novel energy-efficient spintronic devices. An out-of-plane SOT could directly switch perpendicular magnetization. Encouragingly, field-free perpendicular magnetization switching of a two-dimensional (2D) material WTe2/ferromagnet (FM) bilayer has been reported recently, but the working temperature (200 K) is below room temperature. Here, we report the field-free perpendicular magnetization switching carried out at room temperature on a WTe2/Pt/Co/Pt multilayer film. Controlled experiments confirm that the field-free switching is caused by the in-plane antidamping SOT generated in the Pt/Co/Pt multilayer and the out-of-plane generated in the a-axis WTe2 thin film. This work offers a potential method for using spintronic devices made of two-dimensional materials at room temperature.
