Cargando…

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...

Descripción completa

Detalles Bibliográficos
Autores principales: 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.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2016
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
_version_ 1782463851161190400
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
work_keys_str_mv AT bukinn timeresolvedimagingofmagneticvortexdynamicsusingholographywithextendedreferenceautocorrelationbylineardifferentialoperator
AT mckeeverc timeresolvedimagingofmagneticvortexdynamicsusingholographywithextendedreferenceautocorrelationbylineardifferentialoperator
AT burgosparrae timeresolvedimagingofmagneticvortexdynamicsusingholographywithextendedreferenceautocorrelationbylineardifferentialoperator
AT keatleyps timeresolvedimagingofmagneticvortexdynamicsusingholographywithextendedreferenceautocorrelationbylineardifferentialoperator
AT hickenrj timeresolvedimagingofmagneticvortexdynamicsusingholographywithextendedreferenceautocorrelationbylineardifferentialoperator
AT ogrinfy timeresolvedimagingofmagneticvortexdynamicsusingholographywithextendedreferenceautocorrelationbylineardifferentialoperator
AT beutierg timeresolvedimagingofmagneticvortexdynamicsusingholographywithextendedreferenceautocorrelationbylineardifferentialoperator
AT duprazm timeresolvedimagingofmagneticvortexdynamicsusingholographywithextendedreferenceautocorrelationbylineardifferentialoperator
AT popescuh timeresolvedimagingofmagneticvortexdynamicsusingholographywithextendedreferenceautocorrelationbylineardifferentialoperator
AT jaouenn timeresolvedimagingofmagneticvortexdynamicsusingholographywithextendedreferenceautocorrelationbylineardifferentialoperator
AT yakhouharrisf timeresolvedimagingofmagneticvortexdynamicsusingholographywithextendedreferenceautocorrelationbylineardifferentialoperator
AT cavillsa timeresolvedimagingofmagneticvortexdynamicsusingholographywithextendedreferenceautocorrelationbylineardifferentialoperator
AT vanderlaang timeresolvedimagingofmagneticvortexdynamicsusingholographywithextendedreferenceautocorrelationbylineardifferentialoperator