Thermal stability and topological protection of skyrmions in nanotracks

Abstract Magnetic skyrmions are hailed as a potential technology for data storage and other data processing devices. However, their stability against thermal fluctuations is an open question that must be answered before skyrmion-based devices can be designed. In this work, we study paths in the ener...

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Autores principales:	David Cortés-Ortuño, Weiwei Wang, Marijan Beg, Ryan A. Pepper, Marc-Antonio Bisotti, Rebecca Carey, Mark Vousden, Thomas Kluyver, Ondrej Hovorka, Hans Fangohr
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/c1d7336be7fc427f897013d5447dccdd
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spelling	oai:doaj.org-article:c1d7336be7fc427f897013d5447dccdd2021-12-02T15:05:54ZThermal stability and topological protection of skyrmions in nanotracks10.1038/s41598-017-03391-82045-2322https://doaj.org/article/c1d7336be7fc427f897013d5447dccdd2017-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-03391-8https://doaj.org/toc/2045-2322Abstract Magnetic skyrmions are hailed as a potential technology for data storage and other data processing devices. However, their stability against thermal fluctuations is an open question that must be answered before skyrmion-based devices can be designed. In this work, we study paths in the energy landscape via which the transition between the skyrmion and the uniform state can occur in interfacial Dzyaloshinskii-Moriya finite-sized systems. We find three mechanisms the system can take in the process of skyrmion nucleation or destruction and identify that the transition facilitated by the boundary has a significantly lower energy barrier than the other energy paths. This clearly demonstrates the lack of the skyrmion topological protection in finite-sized magnetic systems. Overall, the energy barriers of the system under investigation are too small for storage applications at room temperature, but research into device materials, geometry and design may be able to address this.David Cortés-OrtuñoWeiwei WangMarijan BegRyan A. PepperMarc-Antonio BisottiRebecca CareyMark VousdenThomas KluyverOndrej HovorkaHans FangohrNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-13 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q David Cortés-Ortuño Weiwei Wang Marijan Beg Ryan A. Pepper Marc-Antonio Bisotti Rebecca Carey Mark Vousden Thomas Kluyver Ondrej Hovorka Hans Fangohr Thermal stability and topological protection of skyrmions in nanotracks
description	Abstract Magnetic skyrmions are hailed as a potential technology for data storage and other data processing devices. However, their stability against thermal fluctuations is an open question that must be answered before skyrmion-based devices can be designed. In this work, we study paths in the energy landscape via which the transition between the skyrmion and the uniform state can occur in interfacial Dzyaloshinskii-Moriya finite-sized systems. We find three mechanisms the system can take in the process of skyrmion nucleation or destruction and identify that the transition facilitated by the boundary has a significantly lower energy barrier than the other energy paths. This clearly demonstrates the lack of the skyrmion topological protection in finite-sized magnetic systems. Overall, the energy barriers of the system under investigation are too small for storage applications at room temperature, but research into device materials, geometry and design may be able to address this.
format	article
author	David Cortés-Ortuño Weiwei Wang Marijan Beg Ryan A. Pepper Marc-Antonio Bisotti Rebecca Carey Mark Vousden Thomas Kluyver Ondrej Hovorka Hans Fangohr
author_facet	David Cortés-Ortuño Weiwei Wang Marijan Beg Ryan A. Pepper Marc-Antonio Bisotti Rebecca Carey Mark Vousden Thomas Kluyver Ondrej Hovorka Hans Fangohr
author_sort	David Cortés-Ortuño
title	Thermal stability and topological protection of skyrmions in nanotracks
title_short	Thermal stability and topological protection of skyrmions in nanotracks
title_full	Thermal stability and topological protection of skyrmions in nanotracks
title_fullStr	Thermal stability and topological protection of skyrmions in nanotracks
title_full_unstemmed	Thermal stability and topological protection of skyrmions in nanotracks
title_sort	thermal stability and topological protection of skyrmions in nanotracks
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/c1d7336be7fc427f897013d5447dccdd
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Thermal stability and topological protection of skyrmions in nanotracks

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