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Deriving the skyrmion Hall angle from skyrmion lattice dynamics

Brearton, R.; Turnbull, L.A.; Verezhak, J.A.T.; Balakrishnan, G.; Hatton, P.D.; van der Laan, G.; Hesjedal, T.

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Authors

R. Brearton

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

J.A.T. Verezhak

G. Balakrishnan

G. van der Laan

T. Hesjedal



Abstract

Magnetic skyrmions are topologically non-trivial, swirling magnetization textures that form lattices in helimagnetic materials. These magnetic nanoparticles show promise as high efficiency next-generation information carriers, with dynamics that are governed by their topology. Among the many unusual properties of skyrmions is the tendency of their direction of motion to deviate from that of a driving force; the angle by which they diverge is a materials constant, known as the skyrmion Hall angle. In magnetic multilayer systems, where skyrmions often appear individually, not arranging themselves in a lattice, this deflection angle can be easily measured by tracing the real space motion of individual skyrmions. Here we describe a reciprocal space technique which can be used to determine the skyrmion Hall angle in the skyrmion lattice state, leveraging the properties of the skyrmion lattice under a shear drive. We demonstrate this procedure to yield a quantitative measurement of the skyrmion Hall angle in the room-temperature skyrmion system FeGe, shearing the skyrmion lattice with the magnetic field gradient generated by a single turn Oersted wire.

Citation

Brearton, R., Turnbull, L., Verezhak, J., Balakrishnan, G., Hatton, P., van der Laan, G., & Hesjedal, T. (2021). Deriving the skyrmion Hall angle from skyrmion lattice dynamics. Nature Communications, 12(1), Article 2723. https://doi.org/10.1038/s41467-021-22857-y

Journal Article Type Article
Acceptance Date Mar 30, 2021
Online Publication Date May 11, 2021
Publication Date 2021
Deposit Date Sep 2, 2021
Publicly Available Date Sep 2, 2021
Journal Nature Communications
Electronic ISSN 2041-1723
Publisher Nature Research
Peer Reviewed Peer Reviewed
Volume 12
Issue 1
Article Number 2723
DOI https://doi.org/10.1038/s41467-021-22857-y
Public URL https://durham-repository.worktribe.com/output/1241772

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Advance online version This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder.






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