Spin–orbit torque in perpendicularly magnetized[Pt/Ni]multilayers  

作　　者：曹颖 谢志成 赵治源 杨雨民 雷娜 缪冰锋 魏大海 Ying Cao;Zhicheng Xie;Zhiyuan Zhao;Yumin Yang;Na Lei;Bingfeng Miao;Dahai Wei(State Key Laboratory for Superlattices and Microstructures,Institute of Semiconductors,Chinese Academy of Sciences,Beijing 100083,China;College of Materials Science and Opto-Electronic Technology,University of Chinese Academy of Sciences,Beijing 100049,China;Fert Beijing Institute,MIIT Key Laboratory of Spintronics,School of Integrated Circuit Science and Engineering,Beihang University,Beijing 100191,China;National Laboratory of Solid State Microstructures and Department of Physics,Nanjing University,Nanjing 210093,China)

机构地区：[1]State Key Laboratory for 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 [3]Fert Beijing Institute,MIIT Key Laboratory of Spintronics,School of Integrated Circuit Science and Engineering,Beihang University,Beijing 100191,China [4]National Laboratory of Solid State Microstructures and Department of Physics,Nanjing University,Nanjing 210093,China

出　　处：《Chinese Physics B》2023年第10期145-150,共6页中国物理B（英文版）

基　　金：Project supported by the National Key R&D Program of China(Grant No.2021YFB3502400);the National Natural Science Foundation of China(Grant Nos.52061135105,12074025,11834013,and 12274203);the CAS Project for Yong Scientists in Basic Research(Grant No.YSBR-030);the Key Research Project of Frontier Science of Chinese Academy of Sciences(Grant Nos.XDB44000000 and XDB28000000)。

摘　　要：The performance of spin–orbit torque(SOT)in heavy metal/ferromagnetic metal periodic multilayers has attracted widespread attention.In this paper,we have successfully fabricated a series of perpendicular magnetized[Pt(2-t)/Ni(t)]_4 multilayers,and studied the SOT in the multilayers by varying the thickness of Ni layer t.The current induced magnetization switching was achieved with a critical current density of 1×10^(7)A/cm^(2).The damping-like SOT efficiencyξ_(DL)was extracted from an extended harmonic Hall measurement.We demonstrated that theξ_(DL)can be effectively modulated by t_(Pt)/t_(Ni)ratio of Pt and Ni in the multilayers.The SOT investigation about the[Pt/Ni]N multilayers might provide new material candidates for practical perpendicular SOT-MRAM devices.

关 键 词：spin–orbit torque perpendicular magnetic anisotropy SPINTRONICS 

分 类 号：O469[理学—凝聚态物理]