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Real-space observations of 60-nm skyrmion dynamics in an insulating magnet under low heat flow

Thermal-current induced electron and spin dynamics in solids –dubbed “caloritronics”– have generated widespread interest in both fundamental physics and spintronics applications. Here, we examine the dynamics of nanometric topological spin textures, skyrmions driven by a temperature gradient ∇T or h...

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Autores principales: Yu, Xiuzhen, Kagawa, Fumitaka, Seki, Shinichiro, Kubota, Masashi, Masell, Jan, Yasin, Fehmi S., Nakajima, Kiyomi, Nakamura, Masao, Kawasaki, Masashi, Nagaosa, Naoto, Tokura, Yoshinori
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8382761/
https://www.ncbi.nlm.nih.gov/pubmed/34426575
http://dx.doi.org/10.1038/s41467-021-25291-2
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author Yu, Xiuzhen
Kagawa, Fumitaka
Seki, Shinichiro
Kubota, Masashi
Masell, Jan
Yasin, Fehmi S.
Nakajima, Kiyomi
Nakamura, Masao
Kawasaki, Masashi
Nagaosa, Naoto
Tokura, Yoshinori
author_facet Yu, Xiuzhen
Kagawa, Fumitaka
Seki, Shinichiro
Kubota, Masashi
Masell, Jan
Yasin, Fehmi S.
Nakajima, Kiyomi
Nakamura, Masao
Kawasaki, Masashi
Nagaosa, Naoto
Tokura, Yoshinori
author_sort Yu, Xiuzhen
collection PubMed
description Thermal-current induced electron and spin dynamics in solids –dubbed “caloritronics”– have generated widespread interest in both fundamental physics and spintronics applications. Here, we examine the dynamics of nanometric topological spin textures, skyrmions driven by a temperature gradient ∇T or heat flow, that are evaluated through in-situ real-space observations in an insulating helimagnet Cu(2)OSeO(3). We observe increases of the skyrmion velocity and the Hall angle with increasing ∇T above a critical value of ~ 13 mK/mm, which is two orders of magnitude lower than the ∇T required to drive ferromagnetic domain walls. A comparable magnitude of ∇T is also observed to move the domain walls between a skyrmion domain and the non-topological conical-spin domain from cold to hot regions. Our results demonstrate the efficient manipulation of skyrmions by temperature gradients, a promising step towards energy-efficient “green” spintronics.
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spelling pubmed-83827612021-09-22 Real-space observations of 60-nm skyrmion dynamics in an insulating magnet under low heat flow Yu, Xiuzhen Kagawa, Fumitaka Seki, Shinichiro Kubota, Masashi Masell, Jan Yasin, Fehmi S. Nakajima, Kiyomi Nakamura, Masao Kawasaki, Masashi Nagaosa, Naoto Tokura, Yoshinori Nat Commun Article Thermal-current induced electron and spin dynamics in solids –dubbed “caloritronics”– have generated widespread interest in both fundamental physics and spintronics applications. Here, we examine the dynamics of nanometric topological spin textures, skyrmions driven by a temperature gradient ∇T or heat flow, that are evaluated through in-situ real-space observations in an insulating helimagnet Cu(2)OSeO(3). We observe increases of the skyrmion velocity and the Hall angle with increasing ∇T above a critical value of ~ 13 mK/mm, which is two orders of magnitude lower than the ∇T required to drive ferromagnetic domain walls. A comparable magnitude of ∇T is also observed to move the domain walls between a skyrmion domain and the non-topological conical-spin domain from cold to hot regions. Our results demonstrate the efficient manipulation of skyrmions by temperature gradients, a promising step towards energy-efficient “green” spintronics. Nature Publishing Group UK 2021-08-23 /pmc/articles/PMC8382761/ /pubmed/34426575 http://dx.doi.org/10.1038/s41467-021-25291-2 Text en © The Author(s) 2021 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Yu, Xiuzhen
Kagawa, Fumitaka
Seki, Shinichiro
Kubota, Masashi
Masell, Jan
Yasin, Fehmi S.
Nakajima, Kiyomi
Nakamura, Masao
Kawasaki, Masashi
Nagaosa, Naoto
Tokura, Yoshinori
Real-space observations of 60-nm skyrmion dynamics in an insulating magnet under low heat flow
title Real-space observations of 60-nm skyrmion dynamics in an insulating magnet under low heat flow
title_full Real-space observations of 60-nm skyrmion dynamics in an insulating magnet under low heat flow
title_fullStr Real-space observations of 60-nm skyrmion dynamics in an insulating magnet under low heat flow
title_full_unstemmed Real-space observations of 60-nm skyrmion dynamics in an insulating magnet under low heat flow
title_short Real-space observations of 60-nm skyrmion dynamics in an insulating magnet under low heat flow
title_sort real-space observations of 60-nm skyrmion dynamics in an insulating magnet under low heat flow
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8382761/
https://www.ncbi.nlm.nih.gov/pubmed/34426575
http://dx.doi.org/10.1038/s41467-021-25291-2
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