Abstract

In GdFeCo/Ir/GdFeCo synthetic ferrimagnets with perpendicular anisotropy, the dependence of the hysteresis loops of the anomalous Hall resistance and the characteristics of the loops on the angle between the magnetic field and the sample plane is obtained. The part of the anomalous Hall resistance corresponding to the spin–orbital torque is isolated. The field dependences of the resistance are sensitive to switching between the magnetic states of a two-layer ferrimagnet and repeat the shape of the magnetization hysteresis loop calculated taking into account the interlayer exchange interaction, crystal anisotropy, and Zeeman energy at different angles between the field and the normal to the sample plane. A slow (about 30 min) magnetic relaxation that is detected from the hysteresis loop of the spin–orbit torque is found for switching states of the heterostructure upon a sharp change in the orientation of the magnetic field with respect to the sample. Kerr microscopy shows slow variations in the spin–orbit torque after field reorientation, which are caused by specific domain dynamics inherent in two-layer samples.

中文翻译：

---

GdFeCo/Ir/GdFeCo 合成亚铁磁体中反常霍尔效应的各向异性和缓慢弛豫

摘要

在具有垂直各向异性的 GdFeCo/Ir/GdFeCo 合成亚铁磁体中，获得了反常霍尔电阻的磁滞回线及其特征对磁场与样品平面之间夹角的依赖性。与自旋轨道力矩对应的异常霍尔电阻部分被隔离。电阻的场依赖性对双层亚铁磁体的磁态之间的切换很敏感，并重复计算的磁化磁滞回线的形状，其中考虑了层间交换相互作用、晶体各向异性和塞曼能量在场之间的不同角度和样本平面的法线。从自旋轨道扭矩的磁滞回线检测到的缓慢（约 30 分钟）磁弛豫被发现用于在磁场相对于样品的方向发生急剧变化时切换异质结构的状态。克尔显微镜显示场重新定向后自旋轨道力矩的缓慢变化，这是由双层样品固有的特定域动力学引起的。