Skyrmion-Antiskyrmion Racetrack Memory in Rank-One DMI Materials

Chiral magnetic skyrmions, localized and topologically protected vortex-like magnetic textures that can be found in chiral magnets, are currently under intense study as an entity for information storage and processing. A recent study showed that so-called rank-one materials can host both skyrmions a...

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Autores principales:	Markus Hoffmann, Gideon P. Müller, Christof Melcher, Stefan Blügel
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	skyrmion antiskyrmion racetrack memory dzyaloshinskii-moriya interaction spin-dynamics Thiele equation Physics QC1-999
Acceso en línea:	https://doaj.org/article/b982fabd216b4a72bdc9ec37676f3863
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id	oai:doaj.org-article:b982fabd216b4a72bdc9ec37676f3863
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spelling	oai:doaj.org-article:b982fabd216b4a72bdc9ec37676f38632021-11-30T11:54:44ZSkyrmion-Antiskyrmion Racetrack Memory in Rank-One DMI Materials2296-424X10.3389/fphy.2021.769873https://doaj.org/article/b982fabd216b4a72bdc9ec37676f38632021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fphy.2021.769873/fullhttps://doaj.org/toc/2296-424XChiral magnetic skyrmions, localized and topologically protected vortex-like magnetic textures that can be found in chiral magnets, are currently under intense study as an entity for information storage and processing. A recent study showed that so-called rank-one materials can host both skyrmions and antiskyrmions at the same energy. In such systems the Dzyaloshinskii-Moriya interaction, in general a tensorial quantity, is reduced to only one non-zero component. The presence of both skyrmions and antiskyrmions allows for the investigation of the possible interplay between them. Here, we investigate the stability and interaction of skyrmions and antiskyrmions as well as their transport properties subject to spin-orbit torque for a model system described by an atomistic spin-lattice Hamiltonian employing the simulation software Spirit. The spin-orbit torque driven spin-dynamics described by the Landau-Lifshitz-Gilbert equation is compared to the effective one of the Thiele equation. We demonstrate that, even though skyrmions and antiskyrmions can be seen as antiparticles, a rather dense arrangement of both along a memory track is possible, enabling their use as representations of the binary data bits “0” and “1” in a memory device.Markus HoffmannGideon P. MüllerGideon P. MüllerChristof MelcherStefan BlügelFrontiers Media S.A.articleskyrmionantiskyrmionracetrack memorydzyaloshinskii-moriya interactionspin-dynamicsThiele equationPhysicsQC1-999ENFrontiers in Physics, Vol 9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	skyrmion antiskyrmion racetrack memory dzyaloshinskii-moriya interaction spin-dynamics Thiele equation Physics QC1-999
spellingShingle	skyrmion antiskyrmion racetrack memory dzyaloshinskii-moriya interaction spin-dynamics Thiele equation Physics QC1-999 Markus Hoffmann Gideon P. Müller Gideon P. Müller Christof Melcher Stefan Blügel Skyrmion-Antiskyrmion Racetrack Memory in Rank-One DMI Materials
description	Chiral magnetic skyrmions, localized and topologically protected vortex-like magnetic textures that can be found in chiral magnets, are currently under intense study as an entity for information storage and processing. A recent study showed that so-called rank-one materials can host both skyrmions and antiskyrmions at the same energy. In such systems the Dzyaloshinskii-Moriya interaction, in general a tensorial quantity, is reduced to only one non-zero component. The presence of both skyrmions and antiskyrmions allows for the investigation of the possible interplay between them. Here, we investigate the stability and interaction of skyrmions and antiskyrmions as well as their transport properties subject to spin-orbit torque for a model system described by an atomistic spin-lattice Hamiltonian employing the simulation software Spirit. The spin-orbit torque driven spin-dynamics described by the Landau-Lifshitz-Gilbert equation is compared to the effective one of the Thiele equation. We demonstrate that, even though skyrmions and antiskyrmions can be seen as antiparticles, a rather dense arrangement of both along a memory track is possible, enabling their use as representations of the binary data bits “0” and “1” in a memory device.
format	article
author	Markus Hoffmann Gideon P. Müller Gideon P. Müller Christof Melcher Stefan Blügel
author_facet	Markus Hoffmann Gideon P. Müller Gideon P. Müller Christof Melcher Stefan Blügel
author_sort	Markus Hoffmann
title	Skyrmion-Antiskyrmion Racetrack Memory in Rank-One DMI Materials
title_short	Skyrmion-Antiskyrmion Racetrack Memory in Rank-One DMI Materials
title_full	Skyrmion-Antiskyrmion Racetrack Memory in Rank-One DMI Materials
title_fullStr	Skyrmion-Antiskyrmion Racetrack Memory in Rank-One DMI Materials
title_full_unstemmed	Skyrmion-Antiskyrmion Racetrack Memory in Rank-One DMI Materials
title_sort	skyrmion-antiskyrmion racetrack memory in rank-one dmi materials
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/b982fabd216b4a72bdc9ec37676f3863
work_keys_str_mv	AT markushoffmann skyrmionantiskyrmionracetrackmemoryinrankonedmimaterials AT gideonpmuller skyrmionantiskyrmionracetrackmemoryinrankonedmimaterials AT gideonpmuller skyrmionantiskyrmionracetrackmemoryinrankonedmimaterials AT christofmelcher skyrmionantiskyrmionracetrackmemoryinrankonedmimaterials AT stefanblugel skyrmionantiskyrmionracetrackmemoryinrankonedmimaterials
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Skyrmion-Antiskyrmion Racetrack Memory in Rank-One DMI Materials

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