上海科技大学知识管理系统

Previous research has demonstrated the spin -orbit torque (SOT) switching of Mn 3 Sn in configuration I, where the spin polarization sigma resides within the kagome plane. However, this configuration has yielded several unexpected outcomes, giving rise to debates concerning the fundamental physics governing the switching process. Alternatively, in configuration II, sigma is perpendicular to the kagome plane, which bears greater resemblance to the ferromagnetic system. In this study, we show successful SOT switching of Mn 3 Sn in configuration II, demonstrating behaviors more akin to ferromagnets, e.g., the critical switching current density ( J crit ) and external field ( H ext ) are in the order of 10 10 A / m 2 and tens of Oersted, respectively. The switching result is also independent of the initial state. We further show that the distinctive spin structure of Mn 3 Sn leads to unique switching characteristics, including J crit increasing linearly with H ext and the opposite switching polarity to ferromagnetism. A switching phase diagram is further provided as a guideline for experimental demonstrations, offering a clear physical picture for the observed phenomena.