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The spin structures of interlayer coupled magnetic films with opposite chirality
Using Monte-Carlo simulations and micromagnetic simulations, we reveal how the spin structural correlation and the skyrmion dynamics are affected by the interlayer coupling in a chiral magnetic bilayer system, in which the two layers have opposite chirality. The interaction through interlayer coupli...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5799310/ https://www.ncbi.nlm.nih.gov/pubmed/29402938 http://dx.doi.org/10.1038/s41598-018-20800-8 |
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author | Kang, S. P. Kim, N. J. Kwon, H. Y. Choi, J. W. Min, B. C. Won, C. |
author_facet | Kang, S. P. Kim, N. J. Kwon, H. Y. Choi, J. W. Min, B. C. Won, C. |
author_sort | Kang, S. P. |
collection | PubMed |
description | Using Monte-Carlo simulations and micromagnetic simulations, we reveal how the spin structural correlation and the skyrmion dynamics are affected by the interlayer coupling in a chiral magnetic bilayer system, in which the two layers have opposite chirality. The interaction through interlayer coupling between chiral magnetic structures influences the static and dynamics properties profoundly. The competition between the Dzyaloshinskii-Moriya interaction and the interlayer interaction allows multiple magnetic structures to be energetically stable, which includes sole skyrmion states (skyrmion appears in only one of the layers) and skyrmion pair states (coupled skyrmions in top and bottom layers). When current driven spin transfer torques are applied to each state, the sole skyrmion state is mainly propelled by a spin transfer torque causing the skyrmion hall effect, but the skyrmion pair state is propelled by a torque from skyrmion-skyrmion interaction and not influenced by the skyrmion hall effect. Also upon application of an external magnetic field, we found the skyrmions in a skyrmion pair state extinguish in an exclusive way, as the annihilation of a skyrmion in one of the layers stabilizes the once paired skyrmion in the other layer, i.e. the skyrmion lattice sites have only one skyrmion in either layer. |
format | Online Article Text |
id | pubmed-5799310 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-57993102018-02-14 The spin structures of interlayer coupled magnetic films with opposite chirality Kang, S. P. Kim, N. J. Kwon, H. Y. Choi, J. W. Min, B. C. Won, C. Sci Rep Article Using Monte-Carlo simulations and micromagnetic simulations, we reveal how the spin structural correlation and the skyrmion dynamics are affected by the interlayer coupling in a chiral magnetic bilayer system, in which the two layers have opposite chirality. The interaction through interlayer coupling between chiral magnetic structures influences the static and dynamics properties profoundly. The competition between the Dzyaloshinskii-Moriya interaction and the interlayer interaction allows multiple magnetic structures to be energetically stable, which includes sole skyrmion states (skyrmion appears in only one of the layers) and skyrmion pair states (coupled skyrmions in top and bottom layers). When current driven spin transfer torques are applied to each state, the sole skyrmion state is mainly propelled by a spin transfer torque causing the skyrmion hall effect, but the skyrmion pair state is propelled by a torque from skyrmion-skyrmion interaction and not influenced by the skyrmion hall effect. Also upon application of an external magnetic field, we found the skyrmions in a skyrmion pair state extinguish in an exclusive way, as the annihilation of a skyrmion in one of the layers stabilizes the once paired skyrmion in the other layer, i.e. the skyrmion lattice sites have only one skyrmion in either layer. Nature Publishing Group UK 2018-02-05 /pmc/articles/PMC5799310/ /pubmed/29402938 http://dx.doi.org/10.1038/s41598-018-20800-8 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 Kang, S. P. Kim, N. J. Kwon, H. Y. Choi, J. W. Min, B. C. Won, C. The spin structures of interlayer coupled magnetic films with opposite chirality |
title | The spin structures of interlayer coupled magnetic films with opposite chirality |
title_full | The spin structures of interlayer coupled magnetic films with opposite chirality |
title_fullStr | The spin structures of interlayer coupled magnetic films with opposite chirality |
title_full_unstemmed | The spin structures of interlayer coupled magnetic films with opposite chirality |
title_short | The spin structures of interlayer coupled magnetic films with opposite chirality |
title_sort | spin structures of interlayer coupled magnetic films with opposite chirality |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5799310/ https://www.ncbi.nlm.nih.gov/pubmed/29402938 http://dx.doi.org/10.1038/s41598-018-20800-8 |
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