论文标题
CR1-XPTX中固有的自旋大厅效应引起的强旋转轨道扭矩
Strong Spin-Orbit Torque Induced by the Intrinsic Spin Hall Effect in Cr1-xPtx
论文作者
论文摘要
我们使用光3D铁磁CO作为自旋电流检测器，报告了CR1-XPTX合金中自旋电流的自旋扭矩研究。我们发现，可以通过调谐CR1-XPTX层中的Cr浓度来增强CR1-XPTX/CO双层的阻尼状自旋轨道扭矩，在CR0.2PT0.8的最佳组成下，最大值为0.31。我们发现，CR1-XPTX合金中的自旋当代可以通过PT的固有旋转大厅电导率与携带者寿命之间的特征性权衡来完全理解。我们没有发现通过这种材料中其他机制旋转当前的证据，表明CR的作用与以前的研究中的作用与其他金属和氧化物相同。这项工作还建立了低抗性CR0.2PT0.8作为用于磁记忆和计算技术的节能自旋轨道扭矩提供商。
We report on a spin-orbit torque study of the spin current generation in Cr1-xPtx alloy, using the light 3d ferromagnetic Co as the spin current detector. We find that the dampinglike spin-orbit torque of Cr1-xPtx/Co bilayers can be enhanced by tuning the Cr concentration in the Cr1-xPtx layer, with a maximal value of 0.31 at the optimal composition of Cr0.2Pt0.8. We find that the spin current generation in the Cr1-xPtx alloy can be fully understood by the characteristic trade-off between the intrinsic spin Hall conductivity of Pt and the carrier lifetime in the dirty limit. We find no evidence for the spin current generation by other mechanisms in this material, revealing that the role of Cr is found to be simply the same as other metals and oxides in previous studies. This work also establishes the low-resistivity Cr0.2Pt0.8 as an energy-efficient spin-orbit torque provider for magnetic memory and computing technologies.
