Cargando…

Voltage-controlled skyrmion-based nanodevices for neuromorphic computing using a synthetic antiferromagnet

Spintronics exhibits significant potential for a neuromorphic computing system with high speed, high integration density, and low dissipation. In this article, we propose an ultralow-dissipation skyrmion-based nanodevice composed of a synthetic antiferromagnet (SAF) and a piezoelectric substrate for...

Descripción completa

Detalles Bibliográficos
Autores principales: Yu, Ziyang, Shen, Maokang, Zeng, Zhongming, Liang, Shiheng, Liu, Yong, Chen, Ming, Zhang, Zhenhua, Lu, Zhihong, You, Long, Yang, Xiaofei, Zhang, Yue, Xiong, Rui
Formato: Online Artículo Texto
Lenguaje:English
Publicado: RSC 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9419653/
https://www.ncbi.nlm.nih.gov/pubmed/36133072
http://dx.doi.org/10.1039/d0na00009d
Descripción
Sumario:Spintronics exhibits significant potential for a neuromorphic computing system with high speed, high integration density, and low dissipation. In this article, we propose an ultralow-dissipation skyrmion-based nanodevice composed of a synthetic antiferromagnet (SAF) and a piezoelectric substrate for neuromorphic computing. Skyrmions/skyrmion bubbles can be generated in the upper layer of an SAF with a weak anisotropy energy (E(a)). Applying a weak electric field on the heterostructure, interlayer antiferromagnetic coupling can be manipulated, giving rise to a continuous transition between a large skyrmion bubble and a small skyrmion. This thus induces a variation of the resistance of a magnetic tunneling junction that can mimic the potentiation/depression of a synapse and the leaky-integral-and-fire function of a neuron at a cost of a very low energy consumption of 0.3 fJ. These results pave a way to ultralow power neuromorphic computing applications.