Investigation of spin-orbit torque using current-induced magnetization curve

Abstract Manipulation of magnetization using current-induced torque is crucial for magnetic recording devices. Recently, the spin-orbit torque (SOT) that emerges in a ferromagnetic thin film on a heavy metal is focused as a new scheme for magnetization switching in perpendicularly magnetized systems...

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Autores principales:	Tomohiro Koyama, Yicheng Guan, Daichi Chiba
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/c55dec0ba5594a4f91bb44c6cbc2cd0d
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spelling	oai:doaj.org-article:c55dec0ba5594a4f91bb44c6cbc2cd0d2021-12-02T12:31:59ZInvestigation of spin-orbit torque using current-induced magnetization curve10.1038/s41598-017-00962-72045-2322https://doaj.org/article/c55dec0ba5594a4f91bb44c6cbc2cd0d2017-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-00962-7https://doaj.org/toc/2045-2322Abstract Manipulation of magnetization using current-induced torque is crucial for magnetic recording devices. Recently, the spin-orbit torque (SOT) that emerges in a ferromagnetic thin film on a heavy metal is focused as a new scheme for magnetization switching in perpendicularly magnetized systems. Since the SOT provides a perpendicular effective field to the system, the formation of a magnetic multiple domain state because of Joule heating is supressed in the magnetization reversal process. This means that high reliable switching is possible using the SOT. Here, by utilizing the SOT induced domain stability, we show that an electrical current directly injected to a perpendicularly magnetized Pt/Co/Pd system can magnetize itself, that is, current-induced magnetization process from multi to single domain state. A quantitative determination of the SOT is performed using the current-induced magnetization curve. The present results are of great importance as another approach to evaluate the SOT effect, as well as a demonstration of domain state switching caused by the SOT.Tomohiro KoyamaYicheng GuanDaichi ChibaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-7 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Tomohiro Koyama Yicheng Guan Daichi Chiba Investigation of spin-orbit torque using current-induced magnetization curve
description	Abstract Manipulation of magnetization using current-induced torque is crucial for magnetic recording devices. Recently, the spin-orbit torque (SOT) that emerges in a ferromagnetic thin film on a heavy metal is focused as a new scheme for magnetization switching in perpendicularly magnetized systems. Since the SOT provides a perpendicular effective field to the system, the formation of a magnetic multiple domain state because of Joule heating is supressed in the magnetization reversal process. This means that high reliable switching is possible using the SOT. Here, by utilizing the SOT induced domain stability, we show that an electrical current directly injected to a perpendicularly magnetized Pt/Co/Pd system can magnetize itself, that is, current-induced magnetization process from multi to single domain state. A quantitative determination of the SOT is performed using the current-induced magnetization curve. The present results are of great importance as another approach to evaluate the SOT effect, as well as a demonstration of domain state switching caused by the SOT.
format	article
author	Tomohiro Koyama Yicheng Guan Daichi Chiba
author_facet	Tomohiro Koyama Yicheng Guan Daichi Chiba
author_sort	Tomohiro Koyama
title	Investigation of spin-orbit torque using current-induced magnetization curve
title_short	Investigation of spin-orbit torque using current-induced magnetization curve
title_full	Investigation of spin-orbit torque using current-induced magnetization curve
title_fullStr	Investigation of spin-orbit torque using current-induced magnetization curve
title_full_unstemmed	Investigation of spin-orbit torque using current-induced magnetization curve
title_sort	investigation of spin-orbit torque using current-induced magnetization curve
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/c55dec0ba5594a4f91bb44c6cbc2cd0d
work_keys_str_mv	AT tomohirokoyama investigationofspinorbittorqueusingcurrentinducedmagnetizationcurve AT yichengguan investigationofspinorbittorqueusingcurrentinducedmagnetizationcurve AT daichichiba investigationofspinorbittorqueusingcurrentinducedmagnetizationcurve
_version_	1718394240841547776

Investigation of spin-orbit torque using current-induced magnetization curve

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