通过Dzyaloshinskiii-Moriya相互作用和类场自旋轨道力矩的联合效应实现的确定性磁化铁磁层的无场开关：评价
Deterministic Field-free Switching of a Perpendicularly Magnetized Ferromagnetic Layer via the Joint Effects of Dzyaloshinskii-Moriya Interaction and Field-like Spin-orbit Torque: An Appraisal
摘要：
利用自旋霍尔效应（SHE）产生的自旋轨道矩（SOT）实现垂直磁化铁磁层的无场开关在磁存储器件的应用中具有重要意义。在本文中，我们研究了确定性的SOT开关通过的共同作用的Dzyaloshinskiii-Moriya相互作用（ESTA）和类场转矩（FLT）的微磁模拟。我们证实，在一定范围内的磁化强度值和充电电流密度，它是可能的确定性切换磁化没有援助的外部磁场。我们表明，FLT可以发挥不利的作用，在某些情况下，阻止和减缓的磁化翻转和充电电流驱动的无场开关。然而，在其他情况下，FLT可以帮助确定性的无场SOT开关。此外，研究发现，FLT可以有效地扩大电流密度窗口的确定性的无场SOT开关中存在的寄生电流。
英文摘要：
Field-free switching of perpendicularly magnetized ferromagnetic layer by spin orbit torque (SOT) from the spin Hall effect (SHE) is of great interest in the applications of magnetic memory devices. In this paper, we investigate the deterministic SOT switching through the joint effects of Dzyaloshinskii-Moriya Interaction (DMI) and field-like torque (FLT) by micromagnetic simulations. We confirmed that within a certain range of DMI values and charge current densities, it is possible to deterministically switch the magnetization without the assistance external magnetic field. We show that the FLT could play an adverse role in blocking and slowing down the magnetization switching under certain cases of DMI and charge current-driven field-free switching. However, in other cases, FLT can assist DMI on the deterministic field-free SOT switching. In addition, it is found that FLT can effectively expand the current density window for a deterministic field-free SOT switching in the presence of DMI.
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