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Time-resolved imaging of magnetic vortex dynamics using holography with extended reference autocorrelation by linear differential operator
The magnetisation dynamics of the vortex core and Landau pattern of magnetic thin-film elements has been studied using holography with extended reference autocorrelation by linear differential operator (HERALDO). Here we present the first time-resolved x-ray measurements using this technique and inv...
Autores principales: | , , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5087091/ https://www.ncbi.nlm.nih.gov/pubmed/27796347 http://dx.doi.org/10.1038/srep36307 |
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author | Bukin, N. McKeever, C. Burgos-Parra, E. Keatley, P. S. Hicken, R. J. Ogrin, F. Y. Beutier, G. Dupraz, M. Popescu, H. Jaouen, N. Yakhou-Harris, F. Cavill, S. A. van der Laan, G. |
author_facet | Bukin, N. McKeever, C. Burgos-Parra, E. Keatley, P. S. Hicken, R. J. Ogrin, F. Y. Beutier, G. Dupraz, M. Popescu, H. Jaouen, N. Yakhou-Harris, F. Cavill, S. A. van der Laan, G. |
author_sort | Bukin, N. |
collection | PubMed |
description | The magnetisation dynamics of the vortex core and Landau pattern of magnetic thin-film elements has been studied using holography with extended reference autocorrelation by linear differential operator (HERALDO). Here we present the first time-resolved x-ray measurements using this technique and investigate the structure and dynamics of the domain walls after excitation with nanosecond pulsed magnetic fields. It is shown that the average magnetisation of the domain walls has a perpendicular component that can change dynamically depending on the parameters of the pulsed excitation. In particular, we demonstrate the formation of wave bullet-like excitations, which are generated in the domain walls and can propagate inside them during the cyclic motion of the vortex core. Based on numerical simulations we also show that, besides the core, there are four singularities formed at the corners of the pattern. The polarisation of these singularities has a direct relation to the vortex core, and can be switched dynamically by the wave bullets excited with a magnetic pulse of specific parameters. The subsequent dynamics of the Landau pattern is dependent on the particular configuration of the polarisations of the core and the singularities. |
format | Online Article Text |
id | pubmed-5087091 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-50870912016-11-04 Time-resolved imaging of magnetic vortex dynamics using holography with extended reference autocorrelation by linear differential operator Bukin, N. McKeever, C. Burgos-Parra, E. Keatley, P. S. Hicken, R. J. Ogrin, F. Y. Beutier, G. Dupraz, M. Popescu, H. Jaouen, N. Yakhou-Harris, F. Cavill, S. A. van der Laan, G. Sci Rep Article The magnetisation dynamics of the vortex core and Landau pattern of magnetic thin-film elements has been studied using holography with extended reference autocorrelation by linear differential operator (HERALDO). Here we present the first time-resolved x-ray measurements using this technique and investigate the structure and dynamics of the domain walls after excitation with nanosecond pulsed magnetic fields. It is shown that the average magnetisation of the domain walls has a perpendicular component that can change dynamically depending on the parameters of the pulsed excitation. In particular, we demonstrate the formation of wave bullet-like excitations, which are generated in the domain walls and can propagate inside them during the cyclic motion of the vortex core. Based on numerical simulations we also show that, besides the core, there are four singularities formed at the corners of the pattern. The polarisation of these singularities has a direct relation to the vortex core, and can be switched dynamically by the wave bullets excited with a magnetic pulse of specific parameters. The subsequent dynamics of the Landau pattern is dependent on the particular configuration of the polarisations of the core and the singularities. Nature Publishing Group 2016-10-31 /pmc/articles/PMC5087091/ /pubmed/27796347 http://dx.doi.org/10.1038/srep36307 Text en Copyright © 2016, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Article Bukin, N. McKeever, C. Burgos-Parra, E. Keatley, P. S. Hicken, R. J. Ogrin, F. Y. Beutier, G. Dupraz, M. Popescu, H. Jaouen, N. Yakhou-Harris, F. Cavill, S. A. van der Laan, G. Time-resolved imaging of magnetic vortex dynamics using holography with extended reference autocorrelation by linear differential operator |
title | Time-resolved imaging of magnetic vortex dynamics using holography with extended reference autocorrelation by linear differential operator |
title_full | Time-resolved imaging of magnetic vortex dynamics using holography with extended reference autocorrelation by linear differential operator |
title_fullStr | Time-resolved imaging of magnetic vortex dynamics using holography with extended reference autocorrelation by linear differential operator |
title_full_unstemmed | Time-resolved imaging of magnetic vortex dynamics using holography with extended reference autocorrelation by linear differential operator |
title_short | Time-resolved imaging of magnetic vortex dynamics using holography with extended reference autocorrelation by linear differential operator |
title_sort | time-resolved imaging of magnetic vortex dynamics using holography with extended reference autocorrelation by linear differential operator |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5087091/ https://www.ncbi.nlm.nih.gov/pubmed/27796347 http://dx.doi.org/10.1038/srep36307 |
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