Enhancing large effective spin-torque efficiency in MnRh by magnetic phase transition

• DOI: 10.1063/5.0254025
• Publication Date: 2025-04-18T12:57:57Z
• Authors: Qifeng Li; Chenxi Zhou; Yan Xu; Rongxin Li; Xiaojuan Yuan; Hengguo Lai; Yanrong Song; Fangqi Liu; Yong Liu; Zhenhua Zhang; Zhihong Lu; Rui Xiong

We have experimentally confirmed the large enhancement of effective efficiency in charge-spin conversion through paramagnetic–antiferromagnetic phase transition a MnRh film. Direct current-tuned spin torque-ferromagnetic resonance measurement indicates that Hall angle (θDL) film near temperature (150 K) is value 0.046. Notably, θDL 360% higher than at room temperature. Experimental results indicate attributed to fluctuation during not only improves intrinsic effect but significantly amplifies transmittance. In addition, diffusion length basically independent temperature, indicating dephasing related magnetic order has little influence on propagation antiferromagnetic MnRh. This work further reveals method enhance spin-torque by improvement interfacial conductance and provides theoretical guidance for application spin–orbit torque devices.