Do images of biskyrmions show type-II bubbles?
Do images of biskyrmions show type-II bubbles?
The intense research effort investigating magnetic skyrmions and their applications for spintronics has yielded reports of more exotic objects including the biskyrmion, which consists of a bound pair of counter-rotating vortices of magnetization. Biskyrmions have been identified only from transmission electron microscopy images and have not been observed by other techniques, nor seen in simulations carried out under realistic conditions. Here, quantitative Lorentz transmission electron microscopy, X-ray holography, and micromagnetic simulations are combined to search for biskyrmions in MnNiGa, a material in which they have been reported. Only type-I and type-II magnetic bubbles are found and images purported to show biskyrmions can be explained as type-II bubbles viewed at an angle to their axes. It is not the magnetization but the magnetic flux density resulting from this object that forms the counter-rotating vortices.
biskyrmions, Lorentz transmission electron microscopy, magnetic bubbles, skyrmions, X-ray holography
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Loudon, James C.
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Twitchett-Harrison, Alison C.
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Cortés-Ortuño, David
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Birch, Max T.
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Turnbull, Luke A.
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Štefančič, Aleš
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Ogrin, Feodor Y.
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Burgos-Parra, Erick O.
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Bukin, Nicholas
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Laurenson, Angus
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Popescu, Horia
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Beg, Marijan
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Hovorka, Ondrej
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Fangohr, Hans
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Midgley, Paul A.
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Balakrishnan, Geetha
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Hatton, Peter D.
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19 April 2019
Loudon, James C.
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Twitchett-Harrison, Alison C.
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Cortés-Ortuño, David
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Birch, Max T.
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Turnbull, Luke A.
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Štefančič, Aleš
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Ogrin, Feodor Y.
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Burgos-Parra, Erick O.
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Bukin, Nicholas
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Laurenson, Angus
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Popescu, Horia
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Beg, Marijan
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Hovorka, Ondrej
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Fangohr, Hans
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Midgley, Paul A.
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Balakrishnan, Geetha
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Hatton, Peter D.
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Loudon, James C., Twitchett-Harrison, Alison C., Cortés-Ortuño, David, Birch, Max T., Turnbull, Luke A., Štefančič, Aleš, Ogrin, Feodor Y., Burgos-Parra, Erick O., Bukin, Nicholas, Laurenson, Angus, Popescu, Horia, Beg, Marijan, Hovorka, Ondrej, Fangohr, Hans, Midgley, Paul A., Balakrishnan, Geetha and Hatton, Peter D.
(2019)
Do images of biskyrmions show type-II bubbles?
Advanced Materials, 31 (16), , [1806598].
(doi:10.1002/adma.201806598).
Abstract
The intense research effort investigating magnetic skyrmions and their applications for spintronics has yielded reports of more exotic objects including the biskyrmion, which consists of a bound pair of counter-rotating vortices of magnetization. Biskyrmions have been identified only from transmission electron microscopy images and have not been observed by other techniques, nor seen in simulations carried out under realistic conditions. Here, quantitative Lorentz transmission electron microscopy, X-ray holography, and micromagnetic simulations are combined to search for biskyrmions in MnNiGa, a material in which they have been reported. Only type-I and type-II magnetic bubbles are found and images purported to show biskyrmions can be explained as type-II bubbles viewed at an angle to their axes. It is not the magnetization but the magnetic flux density resulting from this object that forms the counter-rotating vortices.
Text
Loudon_et_al-2019-Advanced_Materials
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More information
Accepted/In Press date: 1 January 2019
e-pub ahead of print date: 7 March 2019
Published date: 19 April 2019
Keywords:
biskyrmions, Lorentz transmission electron microscopy, magnetic bubbles, skyrmions, X-ray holography
Identifiers
Local EPrints ID: 429605
URI: http://eprints.soton.ac.uk/id/eprint/429605
ISSN: 0935-9648
PURE UUID: 8762ae17-f54c-4066-b8cd-033da0df3987
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Date deposited: 01 Apr 2019 16:30
Last modified: 16 Mar 2024 04:18
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Contributors
Author:
James C. Loudon
Author:
Alison C. Twitchett-Harrison
Author:
David Cortés-Ortuño
Author:
Max T. Birch
Author:
Luke A. Turnbull
Author:
Aleš Štefančič
Author:
Feodor Y. Ogrin
Author:
Erick O. Burgos-Parra
Author:
Nicholas Bukin
Author:
Angus Laurenson
Author:
Horia Popescu
Author:
Marijan Beg
Author:
Paul A. Midgley
Author:
Geetha Balakrishnan
Author:
Peter D. Hatton
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