A two-field-scan harmonic Hall voltage analysis for fast,accurate quantification of spin-orbit torques in magnetic heterostructures  

作　　者：Xin Lin Lijun Zhu 

机构地区：[1]State Key Laboratory of Superlattices and Microstructures,Institute of Semiconductors,Chinese Academy of Sciences,Beijing 100083,China [2]College of Materials Science and Opto-Electronic Technology,University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2024年第10期105-112,共8页中国科学：物理学、力学、天文学（英文版）

基　　金：supported partly by the Beijing Natural Science Foundation(Grant No.Z230006);the National Key Research and Development Program of China(Grant No.2022YFA1204004);the National Natural Science Foundation of China(Grant No.12274405);the Strategic Priority Research Program of the Chinese Academy of Sciences(Grant No.XDB44000000)。

摘　　要：We report on the development of a“two-field-scan”harmonic Hall voltage(HHV)analysis,which collects the second HHVas a function of a swept in-plane magnetic field at 45°and 0°relative to the excitation current,for the determination of the spin-orbit torques of transverse spins in magnetic heterostructures without significant perpendicular spins,longitudinal spins,and longitudinal/perpendicular Oersted fields.We demonstrate that this two-field-scan analysis is as accurate as the well-established but time-consuming angle-scan HHV analysis even in the presence of considerable thermoelectric effects but takes more than a factor of 7 less measurement time.We also show that the fit of the HHV data from a single field scan at 0°,which is commonly employed in the literature,is not reliable because the employment of too many free parameters in the fitting of the very slowly varying HHV signal allows erroneous conclusion about the spin-orbit torque efficiencies.

关 键 词：spin-orbit torque spin current spin-orbit coupling SPINTRONICS 

分 类 号：O469[理学—凝聚态物理]