标题： 用于定量确定自旋和轨道扭矩的替代谐波检测方法 显示英文标题

标题： Alternative harmonic detection approach for quantitative determination of spin and orbital torques

摘要： 本研究通过基于谐波霍尔电压技术的实验方法，研究了轻金属氧化物系统中的自旋轨道转矩（SOT），该方法适用于具有面内磁各向异性的样品的面外（OOP）角度几何结构。 同时，还开发了这种替代的面外谐波霍尔检测几何结构的解析推导，并通过实验验证提取了SOT有效场。 此外，为了准确量化SOT，该方法允许对热电效应进行全面表征，为相关系统中精确表征SOT开辟了有前景的途径。 特别是，本研究表明，与具有氧化铝盖层的参考样品相比，在Co(2)|Pt(4)|CuOx(3)中生成轨道电流时，自然氧化的铜与金属铜界面起到了关键作用，使类似阻尼的转矩增加了两倍。 这些发现为非平衡轨道角动量应用方面的未来研究提供了有希望的方向。 显示英文摘要

摘要： In this study, the spin-orbit torque (SOT) in light metal oxide systems is investigated using an experimental approach based on harmonic Hall voltage techniques in out-of-plane (OOP) angular geometry for samples with in-plane magnetic anisotropy. In parallel, an analytical derivation of this alternative OOP harmonic Hall detection geometry has been developed, followed by experimental validation to extract SOT effective fields. In addition, to accurately quantifying SOT, this method allows complete characterization of thermoelectric effects, opening promising avenues for accurate SOT characterization in related systems. In particular, this study corroborates the critical role of naturally oxidized copper interfaced with metallic Cu in the generation of orbital current in Co(2)|Pt(4)|CuOx(3), demonstrating a two-fold increase in damping-like torques compared to a reference sample with an oxidized Al capping layer. These findings offer promising directions for future research on the application aspect of non-equilibrium orbital angular momentum.