Tilted X-Ray Holography of Magnetic Bubbles in MnNiGa Lamellae

Turnbull, Luke A.; Birch, Max T.; Laurenson, Angus; Bukin, Nick; Burgos-Parra, Erick O.; Popescu, Horia; Wilson, Murray N.; Stefančič, Aleš; Balakrishnan, Geetha; Ogrin, Feodor Y.; Hatton, Peter D.

doi:10.1021/acsnano.0c07392

Tilted X-Ray Holography of Magnetic Bubbles in MnNiGa Lamellae

Turnbull, Luke A.; Birch, Max T.; Laurenson, Angus; Bukin, Nick; Burgos-Parra, Erick O.; Popescu, Horia; Wilson, Murray N.; Stefančič, Aleš; Balakrishnan, Geetha; Ogrin, Feodor Y.; Hatton, Peter D.

Authors

Luke Turnbull l.a.turnbull@durham.ac.uk
PGR Student Doctor of Philosophy

Max T. Birch

Angus Laurenson

Nick Bukin

Erick O. Burgos-Parra

Horia Popescu

Murray N. Wilson

Aleš Stefančič

Geetha Balakrishnan

Feodor Y. Ogrin

Professor Peter Hatton p.d.hatton@durham.ac.uk
Professor

Abstract

Nanoscopic lamellae of centrosymmetric ferromagnetic alloys have recently been reported to host the biskyrmion spin texture; however, this has been disputed as the misidentication of topologically trivial type-II magnetic bubbles. Here we demonstrate resonant soft X-ray holographic imaging of topological magnetic states in lamellae of the centrosymmetric alloy (Mn1–xNix)0.65Ga0.35 (x = 0.5), showing the presence of magnetic stripes evolving into single core magnetic bubbles. We observe rotation of the stripe phase via the nucleation and destruction of disclination defects. This indicates the system behaves as a conventional uniaxial ferromagnet. By utilizing the holography with extended reference by autocorrelation linear dierential operator (HERALDO) method, we show tilted holographic images at 30° incidence confirming the presence of type-II magnetic bubbles in this system. This study demonstrates the utility of X-ray imaging techniques in identifying the topology of localized structures in nanoscale magnetism.

Citation

Turnbull, L. A., Birch, M. T., Laurenson, A., Bukin, N., Burgos-Parra, E. O., Popescu, H., …Hatton, P. D. (2021). Tilted X-Ray Holography of Magnetic Bubbles in MnNiGa Lamellae. ACS Nano, 15(1), 387-395. https://doi.org/10.1021/acsnano.0c07392

Journal Article Type	Article
Acceptance Date	Oct 23, 2020
Online Publication Date	Oct 29, 2020
Publication Date	2021
Deposit Date	Nov 2, 2020
Publicly Available Date	Nov 3, 2020
Journal	ACS Nano
Print ISSN	1936-0851
Electronic ISSN	1936-086X
Publisher	American Chemical Society
Peer Reviewed	Peer Reviewed
Volume	15
Issue	1
Pages	387-395
DOI	https://doi.org/10.1021/acsnano.0c07392

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