Solid-State Lithium Ion Supercapacitor for Voltage Control of Skyrmions

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2023-04-26
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Mcode
Degree programme
Language
en
Pages
7
3167-3173
Series
Nano Letters, Volume 23, issue 8
Abstract
Ionic control of magnetism gives rise to high magnetoelectric coupling efficiencies at low voltages, which is essential for low-power magnetism-based nonconventional computing technologies. However, for on-chip applications, magnetoionic devices typically suffer from slow kinetics, poor cyclability, impractical liquid architectures, or strong ambient effects. As a route to overcoming these problems, we demonstrate a LiPON-based solid-state ionic supercapacitor with a magnetic Pt/Co40Fe40B20/Pt thin-film electrode which enables voltage control of a magnetic skyrmion state. Skyrmion nucleation and annihilation are caused by Li ion accumulation and depletion at the magnetic interface under an applied voltage. The skyrmion density can be controlled through dc applied voltages or through voltage pulses. The skyrmions are nucleated by single 60 μs voltage pulses, and devices are cycled 750000 times without loss of electrical performance. Our results demonstrate a simple and robust approach to ionic control of magnetism in spin-based devices.
Description
Funding Information: This work was supported by the Academy of Finland (Grant No. 316857). Lithography was performed at the OtaNano-Micrometerova Nanofabrication Centre, supported by Aalto University. Computational resources were provided by the Aalto Science-IT project. Publisher Copyright: © 2023 The Authors. Published by American Chemical Society.
Keywords
Li ion migration, magnetoionics, neuromorphic computing, skyrmions, supercapacitor
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Citation
Ameziane , M , Huhtasalo , J , Flajšman , L , Mansell , R & van Dijken , S 2023 , ' Solid-State Lithium Ion Supercapacitor for Voltage Control of Skyrmions ' , Nano Letters , vol. 23 , no. 8 , pp. 3167-3173 . https://doi.org/10.1021/acs.nanolett.2c04731