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Observation of a topologically protected state in a magnetic domain wall stabilized by a ferromagnetic chemical barrier

The precise control and stabilization of magnetic domain walls is key for the development of the next generation magnetic nano-devices. Among the multitude of magnetic configurations of a magnetic domain wall, topologically protected states are of particular interest due to their intrinsic stability...

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Autores principales: Ruiz-Gómez, Sandra, Foerster, Michael, Aballe, Lucia, Proenca, Mariana P., Lucas, Irene, Prieto, José Luis, Mascaraque, Arantzazu, de la Figuera, Juan, Quesada, Adrián, Pérez, Lucas
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6232112/
https://www.ncbi.nlm.nih.gov/pubmed/30420675
http://dx.doi.org/10.1038/s41598-018-35039-6
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author Ruiz-Gómez, Sandra
Foerster, Michael
Aballe, Lucia
Proenca, Mariana P.
Lucas, Irene
Prieto, José Luis
Mascaraque, Arantzazu
de la Figuera, Juan
Quesada, Adrián
Pérez, Lucas
author_facet Ruiz-Gómez, Sandra
Foerster, Michael
Aballe, Lucia
Proenca, Mariana P.
Lucas, Irene
Prieto, José Luis
Mascaraque, Arantzazu
de la Figuera, Juan
Quesada, Adrián
Pérez, Lucas
author_sort Ruiz-Gómez, Sandra
collection PubMed
description The precise control and stabilization of magnetic domain walls is key for the development of the next generation magnetic nano-devices. Among the multitude of magnetic configurations of a magnetic domain wall, topologically protected states are of particular interest due to their intrinsic stability. In this work, using XMCD-PEEM, we have observed a topologically protected magnetic domain wall in a ferromagnetic cylindrical nanowire. Its structure is stabilized by periodic sharp alterations of the chemical composition in the nanowire. The large stability of this topologically protected domain wall contrasts with the mobility of other non-protected and non-chiral states also present in the same nanowire. The micromagnetic simulations show the structure and the conditions required to find the topologically protected state. These results are relevant for the design of future spintronic devices such as domain wall based RF oscillators or magnetic memories.
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spelling pubmed-62321122018-11-28 Observation of a topologically protected state in a magnetic domain wall stabilized by a ferromagnetic chemical barrier Ruiz-Gómez, Sandra Foerster, Michael Aballe, Lucia Proenca, Mariana P. Lucas, Irene Prieto, José Luis Mascaraque, Arantzazu de la Figuera, Juan Quesada, Adrián Pérez, Lucas Sci Rep Article The precise control and stabilization of magnetic domain walls is key for the development of the next generation magnetic nano-devices. Among the multitude of magnetic configurations of a magnetic domain wall, topologically protected states are of particular interest due to their intrinsic stability. In this work, using XMCD-PEEM, we have observed a topologically protected magnetic domain wall in a ferromagnetic cylindrical nanowire. Its structure is stabilized by periodic sharp alterations of the chemical composition in the nanowire. The large stability of this topologically protected domain wall contrasts with the mobility of other non-protected and non-chiral states also present in the same nanowire. The micromagnetic simulations show the structure and the conditions required to find the topologically protected state. These results are relevant for the design of future spintronic devices such as domain wall based RF oscillators or magnetic memories. Nature Publishing Group UK 2018-11-12 /pmc/articles/PMC6232112/ /pubmed/30420675 http://dx.doi.org/10.1038/s41598-018-35039-6 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
Ruiz-Gómez, Sandra
Foerster, Michael
Aballe, Lucia
Proenca, Mariana P.
Lucas, Irene
Prieto, José Luis
Mascaraque, Arantzazu
de la Figuera, Juan
Quesada, Adrián
Pérez, Lucas
Observation of a topologically protected state in a magnetic domain wall stabilized by a ferromagnetic chemical barrier
title Observation of a topologically protected state in a magnetic domain wall stabilized by a ferromagnetic chemical barrier
title_full Observation of a topologically protected state in a magnetic domain wall stabilized by a ferromagnetic chemical barrier
title_fullStr Observation of a topologically protected state in a magnetic domain wall stabilized by a ferromagnetic chemical barrier
title_full_unstemmed Observation of a topologically protected state in a magnetic domain wall stabilized by a ferromagnetic chemical barrier
title_short Observation of a topologically protected state in a magnetic domain wall stabilized by a ferromagnetic chemical barrier
title_sort observation of a topologically protected state in a magnetic domain wall stabilized by a ferromagnetic chemical barrier
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6232112/
https://www.ncbi.nlm.nih.gov/pubmed/30420675
http://dx.doi.org/10.1038/s41598-018-35039-6
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