Discrimination of skyrmion chirality via spin–orbit and –transfer torques for logic operation

Abstract Recently many works on magnetic memories and logic circuits, which use a magnetic skyrmion have been reported. Previously we micromagnetically simulated a method to switch a chirality of a magnetic skyrmion formed in a magnetic thin film by introducing a pulsed heat spot. In this paper, we...

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Autores principales:	Yoshinobu Nakatani, Keisuke Yamada, Atsufumi Hirohata
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/75de1b84302f4a0b9567a079fe3b268e
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spelling	oai:doaj.org-article:75de1b84302f4a0b9567a079fe3b268e2021-12-02T18:03:21ZDiscrimination of skyrmion chirality via spin–orbit and –transfer torques for logic operation10.1038/s41598-021-87742-62045-2322https://doaj.org/article/75de1b84302f4a0b9567a079fe3b268e2021-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-87742-6https://doaj.org/toc/2045-2322Abstract Recently many works on magnetic memories and logic circuits, which use a magnetic skyrmion have been reported. Previously we micromagnetically simulated a method to switch a chirality of a magnetic skyrmion formed in a magnetic thin film by introducing a pulsed heat spot. In this paper, we propose a method to discriminate the chirality of a skyrmion in a branched nanowire by using spin–orbit torque (SOT) and spin-transfer torque (STT), and confirm the validity of the method by using simulation. The simulated results show that the motion changes depending on the chirality when additional SOT is applied on a skyrmion moving in a branch by STT. This method can be used as a fundamental building block for electrical detection in memory and logic devices using the chirality of skyrmions as a data bit in addition to the presence (and polarity) of the skyrmions as conventionally used, which can be lead to multiple-valued operation.Yoshinobu NakataniKeisuke YamadaAtsufumi HirohataNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-6 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Yoshinobu Nakatani Keisuke Yamada Atsufumi Hirohata Discrimination of skyrmion chirality via spin–orbit and –transfer torques for logic operation
description	Abstract Recently many works on magnetic memories and logic circuits, which use a magnetic skyrmion have been reported. Previously we micromagnetically simulated a method to switch a chirality of a magnetic skyrmion formed in a magnetic thin film by introducing a pulsed heat spot. In this paper, we propose a method to discriminate the chirality of a skyrmion in a branched nanowire by using spin–orbit torque (SOT) and spin-transfer torque (STT), and confirm the validity of the method by using simulation. The simulated results show that the motion changes depending on the chirality when additional SOT is applied on a skyrmion moving in a branch by STT. This method can be used as a fundamental building block for electrical detection in memory and logic devices using the chirality of skyrmions as a data bit in addition to the presence (and polarity) of the skyrmions as conventionally used, which can be lead to multiple-valued operation.
format	article
author	Yoshinobu Nakatani Keisuke Yamada Atsufumi Hirohata
author_facet	Yoshinobu Nakatani Keisuke Yamada Atsufumi Hirohata
author_sort	Yoshinobu Nakatani
title	Discrimination of skyrmion chirality via spin–orbit and –transfer torques for logic operation
title_short	Discrimination of skyrmion chirality via spin–orbit and –transfer torques for logic operation
title_full	Discrimination of skyrmion chirality via spin–orbit and –transfer torques for logic operation
title_fullStr	Discrimination of skyrmion chirality via spin–orbit and –transfer torques for logic operation
title_full_unstemmed	Discrimination of skyrmion chirality via spin–orbit and –transfer torques for logic operation
title_sort	discrimination of skyrmion chirality via spin–orbit and –transfer torques for logic operation
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/75de1b84302f4a0b9567a079fe3b268e
work_keys_str_mv	AT yoshinobunakatani discriminationofskyrmionchiralityviaspinorbitandtransfertorquesforlogicoperation AT keisukeyamada discriminationofskyrmionchiralityviaspinorbitandtransfertorquesforlogicoperation AT atsufumihirohata discriminationofskyrmionchiralityviaspinorbitandtransfertorquesforlogicoperation
_version_	1718378760131051520

Discrimination of skyrmion chirality via spin–orbit and –transfer torques for logic operation

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