论文标题
由旋转轨道扭矩驱动的混合磁性天空的动力学
Dynamics of hybrid magnetic skyrmion driven by spin-orbit torque in ferrimagnets
论文作者
论文摘要
磁性天空是具有拓扑保护的磁纹理，预计将是将来的Spintronic设备中的信息载体。在这项工作中，我们提出了一种方案，以在铁磁铁中实施混合磁性天空（HMS），并从理论和数值上研究由旋转轨道扭矩驱动的HMS的动力学。据揭示，天堂大厅的效应取决于天空的螺旋和净角动量（ΔS），从而可以通过调谐Dzyaloshinskii-Moriya相互作用和ΔS来有效调节HMS运动。因此，可以通过选择合适的材料来更好地控制HMS运动来抑制大厅的效果。此外，有限δs的马格努斯力抑制横向运动并增强纵向传播，从而导致铁磁体中的HMS动力学快于抗fiferromagnets。
Magnetic skyrmions are magnetic textures with topological protection, which are expected to be information carriers in future spintronic devices. In this work, we propose a scheme to implement hybrid magnetic skyrmions (HMS) in ferrimagnets, and we study theoretically and numerically the dynamics of the HMS driven by spin-orbit torque. It is revealed that the skyrmion Hall effect depends on the skyrmion helicity and the net angular momentum (δs), allowing the effective modulation of the HMS motion through tuning Dzyaloshinskii-Moriya interaction and δs. Thus, the Hall effect can be suppressed through selecting suitable materials to better control the HMS motion. Moreover, Magnus force for finite δs suppresses the transverse motion and enhances the longitudinal propagation, resulting in the HMS dynamics in ferrimagnets faster than that in antiferromagnets.
