论文标题
由自旋霍尔效应引起的开关在平面磁化的铁磁体中，平行于电流的易于轴
Switching induced by spin Hall effect in an in-plane magnetized ferromagnet with the easy axis parallel to the current
论文作者
论文摘要
通过自旋霍尔效应激发的自旋转移扭矩在纳米级的精细结构化铁磁体中的磁化切换引起了很多关注，因为它使我们能够操纵磁化强度而不直接将电流施加到铁磁铁上。但是，对于具有平行于电流的平面易于轴的铁磁体，开关机制仍不清楚。在这里，我们开发了这种类型的磁化切换的分析理论，并揭示了确定性切换的阈值电流公式。可以澄清的是，电流应在一个由两个阈值电流确定的一定范围之间，因为由于外部外部的较大电流而导致的自旋转移扭矩会使磁化强度在能量不稳定状态下，并在硬轴周围引起磁化进攻。
Magnetization switching in a fine-structured ferromagnet of nanoscale by the spin-transfer torque excited via the spin Hall effect has attracted much attention because it enables us to manipulate the magnetization without directly applying current to the ferromagnet. However, the switching mechanism is still unclear in regard to the ferromagnet having an in-plane easy axis parallel to the current. Here, we develop an analytical theory of the magnetization switching in this type of ferromagnet, and reveal the threshold current formulas for a deterministic switching. It is clarified that the current should be in between a certain range determined by two threshold currents because the spin-transfer torque due to a large current outside the range brings the magnetization in an energetically unstable state, and causes magnetization precession around the hard axis.
