Bukin, N., McKeever, C., Burgos-Parra, E. et al. (10 more authors) (2016) Time-resolved imaging of magnetic vortex dynamics using holography with extended reference autocorrelation by linear differential operator. Scientific Reports. 36307. pp. 1-10. ISSN 2045-2322
Abstract
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.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2016, the author(s). |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Physics (York) |
Depositing User: | Pure (York) |
Date Deposited: | 17 Nov 2016 17:08 |
Last Modified: | 16 Oct 2024 13:25 |
Published Version: | https://doi.org/10.1038/srep36307 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1038/srep36307 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:107692 |
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Filename: srep36307.pdf
Description: Time-resolved imaging of magnetic vortex dynamics
Licence: CC-BY 2.5