标题： 通过自旋轨道力矩识别反铁磁材料的切换 显示英文标题

标题： Identifying Switching of Antiferromagnets by Spin-Orbit Torques

摘要： 反铁磁材料是超快自旋电子应用的有前景的候选者，利用了由电流引起的自旋轨道转矩。然而，实验上区分由电流脉冲驱动的亚铁磁化（奈尔矢量）的不同切换机制仍然是一个挑战。在一个典型的研究中，我们以共线反铁磁化合物 Mn$_2$Au 为例，表明在广泛的参数范围内，较慢的热磁弹性效应主导了切换过程。然而，在纳秒级短电流脉冲的条件下，我们观察到了完全由奈尔自旋轨道转矩驱动的切换。我们证明，这种超快机制能够在器件结构中通过电流脉冲实现奈尔矢量的完全方向性对齐。 显示英文摘要

摘要： Antiferromagnets are promising candidates for ultrafast spintronic applications, leveraging current-induced spin-orbit torques. However, experimentally distinguishing between different switching mechanisms of the staggered magnetization (N\'eel vector) driven by current pulses remains a challenge. In an exemplary study of the collinear antiferromagnetic compound Mn$_2$Au, we demonstrate that slower thermomagnetoelastic effects predominantly govern switching over a wide parameter range. In the regime of short current pulses in the nanosecond range, however, we observe fully N\'eel spin-orbit torque driven switching. We show that this ultrafast mechanism enables the complete directional alignment of the N\'eel vector by current pulses in device structures.