Switching plasticity in compensated ferrimagnetic multilayers for neuromorphic computing  

作　　者：Weihao Li Xiukai Lan Xionghua Liu Enze Zhang Yongcheng Deng Kaiyou Wang 李伟浩;兰修凯;刘雄华;张恩泽;邓永城;王开友(State Key Laboratory for Superlattices and Microstructures,Institute of Semiconductors,Chinese Academy of Sciences,Beijing 100083 China;Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049 China;Beijing Academy of Quantum Information Sciences,Beijing 100083 China;Center for Excellence in Topological Quantum Computation,University of Chinese Academy of Sciences,Beijing 100049 China)

机构地区：[1]State Key Laboratory for Superlattices and Microstructures,Institute of Semiconductors,Chinese Academy of Sciences,Beijing 100083 China [2]Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049 China [3]Beijing Academy of Quantum Information Sciences,Beijing 100083 China [4]Center for Excellence in Topological Quantum Computation,University of Chinese Academy of Sciences,Beijing 100049 China

出　　处：《Chinese Physics B》2022年第11期143-148,共6页中国物理B（英文版）

基　　金：supported by Beijing Natural Science Foundation Key Program(Grant No.Z190007);Beijing Natural Science Foundation(Grant No.2212048);the National Natural Science Foundation of China(Grant Nos.11474272,61774144,and 12004212);the Chinese Academy of Sciences(Grant Nos.QYZDY-SSW-JSC020,XDB28000000,and XDB44000000)。

摘　　要：Current-induced multilevel magnetization switching in ferrimagnetic spintronic devices is highly pursued for the application in neuromorphic computing.In this work,we demonstrate the switching plasticity in Co/Gd ferrimagnetic multilayers where the binary states magnetization switching induced by spin–orbit toque can be tuned into a multistate one as decreasing the domain nucleation barrier.Therefore,the switching plasticity can be tuned by the perpendicular magnetic anisotropy of the multilayers and the in-plane magnetic field.Moreover,we used the switching plasticity of Co/Gd multilayers for demonstrating spike timing-dependent plasticity and sigmoid-like activation behavior.This work gives useful guidance to design multilevel spintronic devices which could be applied in high-performance neuromorphic computing.

关 键 词：switching plasticity compensated ferrimagnet spin-orbit torque spike timing-dependent plasticity sigmoidal neuron handwritten digits recognition neuromorphic computing 

分 类 号：O469[理学—凝聚态物理]