Control of the stochastic response of magnetization dynamics in spin-torque oscillator through radio-frequency magnetic fields

Abstract Neuromorphic computing using spintronic devices, such as spin-torque oscillators (STOs), has been intensively studied for energy-efficient data processing. One of the critical issues in this application is stochasticity in magnetization dynamics, which limits the accuracy of computation. Su...

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Autores principales:	Sumito Tsunegi, Tomohiro Taniguchi, Daiki Suzuki, Kay Yakushiji, Akio Fukushima, Shinji Yuasa, Hitoshi Kubota
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/0bcab3da94574457a382e2170f92b63a
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spelling	oai:doaj.org-article:0bcab3da94574457a382e2170f92b63a2021-12-02T19:06:40ZControl of the stochastic response of magnetization dynamics in spin-torque oscillator through radio-frequency magnetic fields10.1038/s41598-021-95636-w2045-2322https://doaj.org/article/0bcab3da94574457a382e2170f92b63a2021-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-95636-whttps://doaj.org/toc/2045-2322Abstract Neuromorphic computing using spintronic devices, such as spin-torque oscillators (STOs), has been intensively studied for energy-efficient data processing. One of the critical issues in this application is stochasticity in magnetization dynamics, which limits the accuracy of computation. Such stochastic behavior, however, plays a key role in stochastic computing and machine learning. It is therefore important to develop methods for both suppressing and enhancing stochastic response in spintronic devices. We report on experimental investigations on control of stochastic quantity, such as the width of a distribution of transient time in magnetization dynamics in vortex-type STO. The spin-transfer effect can suppress stochasticity in transient dynamics from a non-oscillating to oscillating state, whereas an application of a radio-frequency magnetic field is effective in reducing stochasticity on the time evolution of the oscillating state.Sumito TsunegiTomohiro TaniguchiDaiki SuzukiKay YakushijiAkio FukushimaShinji YuasaHitoshi KubotaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Sumito Tsunegi Tomohiro Taniguchi Daiki Suzuki Kay Yakushiji Akio Fukushima Shinji Yuasa Hitoshi Kubota Control of the stochastic response of magnetization dynamics in spin-torque oscillator through radio-frequency magnetic fields
description	Abstract Neuromorphic computing using spintronic devices, such as spin-torque oscillators (STOs), has been intensively studied for energy-efficient data processing. One of the critical issues in this application is stochasticity in magnetization dynamics, which limits the accuracy of computation. Such stochastic behavior, however, plays a key role in stochastic computing and machine learning. It is therefore important to develop methods for both suppressing and enhancing stochastic response in spintronic devices. We report on experimental investigations on control of stochastic quantity, such as the width of a distribution of transient time in magnetization dynamics in vortex-type STO. The spin-transfer effect can suppress stochasticity in transient dynamics from a non-oscillating to oscillating state, whereas an application of a radio-frequency magnetic field is effective in reducing stochasticity on the time evolution of the oscillating state.
format	article
author	Sumito Tsunegi Tomohiro Taniguchi Daiki Suzuki Kay Yakushiji Akio Fukushima Shinji Yuasa Hitoshi Kubota
author_facet	Sumito Tsunegi Tomohiro Taniguchi Daiki Suzuki Kay Yakushiji Akio Fukushima Shinji Yuasa Hitoshi Kubota
author_sort	Sumito Tsunegi
title	Control of the stochastic response of magnetization dynamics in spin-torque oscillator through radio-frequency magnetic fields
title_short	Control of the stochastic response of magnetization dynamics in spin-torque oscillator through radio-frequency magnetic fields
title_full	Control of the stochastic response of magnetization dynamics in spin-torque oscillator through radio-frequency magnetic fields
title_fullStr	Control of the stochastic response of magnetization dynamics in spin-torque oscillator through radio-frequency magnetic fields
title_full_unstemmed	Control of the stochastic response of magnetization dynamics in spin-torque oscillator through radio-frequency magnetic fields
title_sort	control of the stochastic response of magnetization dynamics in spin-torque oscillator through radio-frequency magnetic fields
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/0bcab3da94574457a382e2170f92b63a
work_keys_str_mv	AT sumitotsunegi controlofthestochasticresponseofmagnetizationdynamicsinspintorqueoscillatorthroughradiofrequencymagneticfields AT tomohirotaniguchi controlofthestochasticresponseofmagnetizationdynamicsinspintorqueoscillatorthroughradiofrequencymagneticfields AT daikisuzuki controlofthestochasticresponseofmagnetizationdynamicsinspintorqueoscillatorthroughradiofrequencymagneticfields AT kayyakushiji controlofthestochasticresponseofmagnetizationdynamicsinspintorqueoscillatorthroughradiofrequencymagneticfields AT akiofukushima controlofthestochasticresponseofmagnetizationdynamicsinspintorqueoscillatorthroughradiofrequencymagneticfields AT shinjiyuasa controlofthestochasticresponseofmagnetizationdynamicsinspintorqueoscillatorthroughradiofrequencymagneticfields AT hitoshikubota controlofthestochasticresponseofmagnetizationdynamicsinspintorqueoscillatorthroughradiofrequencymagneticfields
_version_	1718377129118269440

Control of the stochastic response of magnetization dynamics in spin-torque oscillator through radio-frequency magnetic fields

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