Multiple modes of perpendicular magnetization switching scheme in single spin-orbit torque device  

作　　者：Tong-Xi Liu Zhao-Hao Wang Min Wang Chao Wang Bi Wu Wei-Qiang Liu Wei-Sheng Zhao 刘桐汐;王昭昊;王旻;王朝;吴比;刘伟强;赵巍胜(Fert Beijing Institute,MIIT Key Laboratory of Spintronics,School of Integrated Circuit Science and Engineering,Beihang University,Beijing 100191,China;College of Integrated Circuits,Nanjing University of Aeronautics and Astronautics,Nanjing 211106,China)

机构地区：[1]Fert Beijing Institute,MIIT Key Laboratory of Spintronics,School of Integrated Circuit Science and Engineering,2 Beihang University,Beijing 100191,China [2]College of Integrated Circuits,Nanjing University of Aeronautics and Astronautics,Nanjing 211106,China

出　　处：《Chinese Physics B》2022年第10期283-287,共5页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.62171013 and 61704005);the National Key Research and Development Program of China(Grant Nos.2021YFB3601303,2021YFB3601304,and 2021YFB3601300);the Beijing Municipal Science and Technology Project,China(Grant No.Z201100004220002);the Fundamental Research Funds for the Central Universities,China(Grant No.YWF-21-BJ-J-1043)。

摘　　要：Spin-orbit torque(SOT)has been considered as one of the promising technologies for the next-generation magnetic random access memory(MRAM).So far,SOT has been widely utilized for inducing various modes of magnetization switching.However,it is a challenge that so many multiple modes of magnetization switching are integrated together.Here we propose a method of implementing both unipolar switching and bipolar switching of the perpendicular magnetization within a single SOT device.The mode of switching can be easily changed by tuning the amplitude of the applied current.We show that the field-like torque plays an important role in switching process.The field-like torque induces the precession of the magnetization in the case of unipolar switching,however,the field-like torque helps to generate an effective zcomponent torque in the case of bipolar switching.In addition,the influence of key parameters on the mode of switching is discussed,including the field-like torque strength,the bias field,and the current density.Our proposal can be used to design novel reconfigurable logic circuits in the near future.

关 键 词：spin-orbit torque(SOT) field-like torque magnetization switching perpendicular magnetization 

分 类 号：O469[理学—凝聚态物理]