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Do images of biskyrmions show type‐II bubbles?

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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

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Official URL: http://dx.doi.org/10.1002/adma.201806598

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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.

Item Type: Journal Article
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Physics
Library of Congress Subject Headings (LCSH): Skyrme model, Magnetic bubbles, X-ray holography
Journal or Publication Title: Advanced Materials
Publisher: Wiley - V C H Verlag GmbH & Co. KGaA
ISSN: 0935-9648
Official Date: 7 March 2019
Dates:
DateEvent
7 March 2019Published
7 March 2019Accepted
31 January 2019Modified
11 October 2018Submitted
Volume: 31
Number: 16
Article Number: 1806598
DOI: 10.1002/adma.201806598
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Open Access
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
EP/N032128/1[EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266
#676541H2020 European Research Councilhttp://dx.doi.org/10.13039/100010663
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