Tilted Perpendicular Anisotropy-Induced Spin-Orbit Ratchet Effects  

作　　者：陈彬 龙垣图 聂宇林 凌姿瑀 马天平 张瑞轩 吴义政 骆泳铭 王宁宁 Bin Chen;Yuantu Long;Yulin Nie;Ziyu Ling;Tianping Ma;Ruixuan Zhang;Yizheng Wu;Yongming Luo;Ningning Wang(School of Electronics and Information Engineering,Hangzhou Dianzi University,Hangzhou 310018,China;State Key Laboratory of Surface Physics and Department of Physics,Fudan University,Shanghai 200433,China;Research Center for Intelligent Computing Platforms,Zhejiang Laboratory,Hangzhou 311121,China;Wenzhou Institute of Hangzhou Dianzi University,Wenzhou 325038,China;Anhui Key Laboratory of Magnetic Functional Materials and Devices,School of Materials Science and Engineering,Anhui University,Hefei 230601,China)

机构地区：[1]School of Electronics and Information Engineering,Hangzhou Dianzi University,Hangzhou 310018,China [2]State Key Laboratory of Surface Physics and Department of Physics,Fudan University,Shanghai 200433,China [3]Research Center for Intelligent Computing Platforms,Zhejiang Laboratory,Hangzhou 311121,China [4]Wenzhou Institute of Hangzhou Dianzi University,Wenzhou 325038,China [5]Anhui Key Laboratory of Magnetic Functional Materials and Devices,School of Materials Science and Engineering,Anhui University,Hefei 230601,China

出　　处：《Chinese Physics Letters》2024年第7期181-186,I0001,I0002,I0003,共9页中国物理快报（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant No.12274108);the Natural Science Foundation of Zhejiang Province (Grant Nos.LY23A040008 and LY23A040008);the Basic Scientific Research Project of Wenzhou (Grant No.G20220025)。

摘　　要：Using micromagnetic simulations, we demonstrate the tilted perpendicular anisotropy-induced spin-orbit ratchet effect. In spin-orbit torque(SOT)-induced magnetization switching, the critical currents required to switch between the two magnetization states(upward and downward magnetization) are asymmetric. In addition, in the nanowire structure, tilted anisotropy induces formation of tilted domain walls(DWs). The tilted DWs exhibit a ratchet behavior during motion. The ratchet effect during switching and DW motions can be tuned by changing the current direction with respect to the tilting direction of anisotropy. The ratchet motion of the DWs can be used to mimic the leaky-integrate-fire function of a biological neuron, especially the asymmetric property of the “potential” and “reset” processes. Our results provide a full understanding of the influence of tilted perpendicular anisotropy on SOT-induced magnetization switching and DW motion, and are beneficial for designs of further SOT-based devices.

关 键 词：MOTION EFFECT MAGNETIZATION 

分 类 号：O469[理学—凝聚态物理]