In this work, we report the reorientation of magnetization by spin–orbit torque (SOT) in YIG/Pt bilayers. The SOT is investigated by measuring the spin Hall magnetoresistance (SMR), which is highly sensitive to the direction of magnetic moment of YIG. An external in-plane rotating magnetic field which is applied to the YIG/Pt bilayers, and the evolutions of SMR under different injected currents in the Pt layer, result in deviation of SMR curve from the standard shape. We conclude that the SOT caused by spin accumulation near the interface between YIG and Pt can effectively reorient the in-plane magnetic moment of YIG. This discovery provides an effective way to modulate YIG magnetic moments by electrical methods.

在这项工作中，我们报告了在 YIG/Pt 双层中通过自旋轨道扭矩 (SOT) 重新定向磁化。SOT 通过测量自旋霍尔磁阻 (SMR) 来研究，它对 YIG 的磁矩方向高度敏感。施加于 YIG/Pt 双层的外部平面内旋转磁场，以及 Pt 层中不同注入电流下 SMR 的演变，导致 SMR 曲线偏离标准形状。我们得出结论，在 YIG 和 Pt 之间的界面附近由自旋积累引起的 SOT 可以有效地重新定向 YIG 的面内磁矩。这一发现提供了一种通过电学方法调制 YIG 磁矩的有效方法。