Author(s): Li, WH (Li, Weihao); Lan, XK (Lan, Xiukai); Liu, XH (Liu, Xionghua); Zhang, EZ (Zhang, Enze); Deng, YC (Deng, Yongcheng); Wang, KY (Wang, Kaiyou)

Source: CHINESE PHYSICS B Volume: 31 Issue: 11 Article Number: 117106 DOI: 10.1088/1674-1056/ac89dd Published: OCT 1 2022

Abstract: 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.

Accession Number: WOS:000876701400001

ISSN: 1674-1056

eISSN: 2058-3834

Full Text: https://iopscience.iop.org/article/10.1088/1674-1056/ac89dd