通过光子螺旋度产生的轨道角动量在铁磁金属中实现光诱导力矩
Light-induced torque in ferromagnetic metals via orbital angular momentum generated by photon-helicity
浏览论文内容
中文总结 AI 辅助
本研究通过探究Co$_{1-x}$Pt$_{x}$合金薄膜中光子螺旋度诱导的磁化进动，发现了单个铁磁层中未被讨论的类阻尼力矩，并基于自旋轨道耦合模型阐明了力矩的成分依赖性，增进了对磁金属中光子螺旋度与磁化相互作用物理机制的理解。
中文摘要 AI 辅助
我们研究了Co$_{1-x}$Pt$_{x}$合金薄膜中光子螺旋度诱导的磁化进动。除了归因于逆法拉第效应产生磁场的类场力矩外，我们还观察到了在单个铁磁层中从未被讨论过的非平凡且较大的类阻尼力矩。这两种力矩的成分依赖性通过一个模型得到了有效阐明，该模型考虑了磁化强度与光子螺旋度产生的电子轨道角动量之间通过自旋轨道相互作用的相互耦合。这项工作显著增强了我们对磁金属中光子螺旋度与磁化强度相互作用相关物理机制的理解。
英文摘要
We investigated photon-helicity-induced magnetization precession in Co$_{1-x}$Pt$_{x}$ alloy thin films. In addition to field-like torque, attributable to magnetic field generation owing to {\it the inverse Faraday effect}, we observed non-trivial and large damping-like torque which has never been discussed for single ferromagnetic layer. The composition dependence of those two torques is effectively elucidated by a model that considers mutual coupling via spin-orbit interaction between magnetization and the electronic orbital angular momentum generated by photon-helicity. This work significantly enhances our understanding of the physics relevant to the interplay of photon-helicity and magnetization in magnetic metals.
