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Current-driven dynamics and inhibition of the skyrmion Hall effect of ferrimagnetic skyrmions in GdFeCo films

Magnetic skyrmions are swirling magnetic textures with novel characteristics suitable for future spintronic and topological applications. Recent studies confirmed the room-temperature stabilization of skyrmions in ultrathin ferromagnets. However, such ferromagnetic skyrmions show an undesirable topo...

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Autores principales: Woo, Seonghoon, Song, Kyung Mee, Zhang, Xichao, Zhou, Yan, Ezawa, Motohiko, Liu, Xiaoxi, Finizio, S., Raabe, J., Lee, Nyun Jong, Kim, Sang-Il, Park, Seung-Young, Kim, Younghak, Kim, Jae-Young, Lee, Dongjoon, Lee, OukJae, Choi, Jun Woo, Min, Byoung-Chul, Koo, Hyun Cheol, Chang, Joonyeon
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5840382/
https://www.ncbi.nlm.nih.gov/pubmed/29511179
http://dx.doi.org/10.1038/s41467-018-03378-7
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author Woo, Seonghoon
Song, Kyung Mee
Zhang, Xichao
Zhou, Yan
Ezawa, Motohiko
Liu, Xiaoxi
Finizio, S.
Raabe, J.
Lee, Nyun Jong
Kim, Sang-Il
Park, Seung-Young
Kim, Younghak
Kim, Jae-Young
Lee, Dongjoon
Lee, OukJae
Choi, Jun Woo
Min, Byoung-Chul
Koo, Hyun Cheol
Chang, Joonyeon
author_facet Woo, Seonghoon
Song, Kyung Mee
Zhang, Xichao
Zhou, Yan
Ezawa, Motohiko
Liu, Xiaoxi
Finizio, S.
Raabe, J.
Lee, Nyun Jong
Kim, Sang-Il
Park, Seung-Young
Kim, Younghak
Kim, Jae-Young
Lee, Dongjoon
Lee, OukJae
Choi, Jun Woo
Min, Byoung-Chul
Koo, Hyun Cheol
Chang, Joonyeon
author_sort Woo, Seonghoon
collection PubMed
description Magnetic skyrmions are swirling magnetic textures with novel characteristics suitable for future spintronic and topological applications. Recent studies confirmed the room-temperature stabilization of skyrmions in ultrathin ferromagnets. However, such ferromagnetic skyrmions show an undesirable topological effect, the skyrmion Hall effect, which leads to their current-driven motion towards device edges, where skyrmions could easily be annihilated by topographic defects. Recent theoretical studies have predicted enhanced current-driven behavior for antiferromagnetically exchange-coupled skyrmions. Here we present the stabilization of these skyrmions and their current-driven dynamics in ferrimagnetic GdFeCo films. By utilizing element-specific X-ray imaging, we find that the skyrmions in the Gd and FeCo sublayers are antiferromagnetically exchange-coupled. We further confirm that ferrimagnetic skyrmions can move at a velocity of ~50 m s(−1) with reduced skyrmion Hall angle, |θ(SkHE)| ~ 20°. Our findings open the door to ferrimagnetic and antiferromagnetic skyrmionics while providing key experimental evidences of recent theoretical studies.
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spelling pubmed-58403822018-03-09 Current-driven dynamics and inhibition of the skyrmion Hall effect of ferrimagnetic skyrmions in GdFeCo films Woo, Seonghoon Song, Kyung Mee Zhang, Xichao Zhou, Yan Ezawa, Motohiko Liu, Xiaoxi Finizio, S. Raabe, J. Lee, Nyun Jong Kim, Sang-Il Park, Seung-Young Kim, Younghak Kim, Jae-Young Lee, Dongjoon Lee, OukJae Choi, Jun Woo Min, Byoung-Chul Koo, Hyun Cheol Chang, Joonyeon Nat Commun Article Magnetic skyrmions are swirling magnetic textures with novel characteristics suitable for future spintronic and topological applications. Recent studies confirmed the room-temperature stabilization of skyrmions in ultrathin ferromagnets. However, such ferromagnetic skyrmions show an undesirable topological effect, the skyrmion Hall effect, which leads to their current-driven motion towards device edges, where skyrmions could easily be annihilated by topographic defects. Recent theoretical studies have predicted enhanced current-driven behavior for antiferromagnetically exchange-coupled skyrmions. Here we present the stabilization of these skyrmions and their current-driven dynamics in ferrimagnetic GdFeCo films. By utilizing element-specific X-ray imaging, we find that the skyrmions in the Gd and FeCo sublayers are antiferromagnetically exchange-coupled. We further confirm that ferrimagnetic skyrmions can move at a velocity of ~50 m s(−1) with reduced skyrmion Hall angle, |θ(SkHE)| ~ 20°. Our findings open the door to ferrimagnetic and antiferromagnetic skyrmionics while providing key experimental evidences of recent theoretical studies. Nature Publishing Group UK 2018-03-06 /pmc/articles/PMC5840382/ /pubmed/29511179 http://dx.doi.org/10.1038/s41467-018-03378-7 Text en © The Author(s) 2018 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/.
spellingShingle Article
Woo, Seonghoon
Song, Kyung Mee
Zhang, Xichao
Zhou, Yan
Ezawa, Motohiko
Liu, Xiaoxi
Finizio, S.
Raabe, J.
Lee, Nyun Jong
Kim, Sang-Il
Park, Seung-Young
Kim, Younghak
Kim, Jae-Young
Lee, Dongjoon
Lee, OukJae
Choi, Jun Woo
Min, Byoung-Chul
Koo, Hyun Cheol
Chang, Joonyeon
Current-driven dynamics and inhibition of the skyrmion Hall effect of ferrimagnetic skyrmions in GdFeCo films
title Current-driven dynamics and inhibition of the skyrmion Hall effect of ferrimagnetic skyrmions in GdFeCo films
title_full Current-driven dynamics and inhibition of the skyrmion Hall effect of ferrimagnetic skyrmions in GdFeCo films
title_fullStr Current-driven dynamics and inhibition of the skyrmion Hall effect of ferrimagnetic skyrmions in GdFeCo films
title_full_unstemmed Current-driven dynamics and inhibition of the skyrmion Hall effect of ferrimagnetic skyrmions in GdFeCo films
title_short Current-driven dynamics and inhibition of the skyrmion Hall effect of ferrimagnetic skyrmions in GdFeCo films
title_sort current-driven dynamics and inhibition of the skyrmion hall effect of ferrimagnetic skyrmions in gdfeco films
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5840382/
https://www.ncbi.nlm.nih.gov/pubmed/29511179
http://dx.doi.org/10.1038/s41467-018-03378-7
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