Electrically programmable magnetic coupling in an Ising network exploiting solid-state ionic gating
Abstract
Two-dimensional arrays of magnetically coupled nanomagnets provide a mesoscopic platform for exploring collective phenomena as well as realizing a broad range of spintronic devices. In particular, the magnetic coupling plays a critical role in determining the nature of the cooperative behaviour and providing new functionalities in nanomagnet-based devices. Here, we create coupled Ising-like nanomagnets in which the coupling between adjacent nanomagnetic regions can be reversibly converted between parallel and antiparallel through solid-state ionic gating. This is achieved with the voltage-control of magnetic anisotropies in a nanosized region where the symmetric exchange interaction favours parallel alignment and the antisymmetric exchange interaction, namely the Dzyaloshinskii-Moriya interaction, favours antiparallel alignment. Applying this concept to a two-dimensional lattice, we demonstrate a voltage-controlled phase transition in artificial spin ices. Furthermore, we achieve an addressable control of the individual couplings and realize an electrically programmable Ising network, which opens up new avenues to design nanomagnet-based logic devices and neuromorphic computers
Cite
@article{arxiv.2305.03422,
title = {Electrically programmable magnetic coupling in an Ising network exploiting solid-state ionic gating},
author = {Chao Yun and Zhongyu Liang and Aleš Hrabec and Zhentao Liu and Mantao Huang and Leran Wang and Yifei Xiao and Yikun Fang and Wei Li and Wenyun Yang and Yanglong Hou and Jinbo Yang and Laura J. Heyderman and Pietro Gambardella and Zhaochu Luo},
journal= {arXiv preprint arXiv:2305.03422},
year = {2023}
}