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Deriving the skyrmion Hall angle from skyrmion lattice dynamics
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Brearton, R., Turnbull, L. A., Verezhak, J. A. T., Balakrishnan, Geetha, Hatton, P. D., van der Laan, G. and Hesjedal, T. (2021) Deriving the skyrmion Hall angle from skyrmion lattice dynamics. Nature Communications, 12 (1). 2723. doi:10.1038/s41467-021-22857-y ISSN 2041-1723.
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Official URL: http://dx.doi.org/10.1038/s41467-021-22857-y
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.
Item Type: | Journal Article | ||||||||||||
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Subjects: | Q Science > QC Physics | ||||||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||||||
Library of Congress Subject Headings (LCSH): | Skyrme model, Magnetic materials, Chirality , Lattice dynamics | ||||||||||||
Journal or Publication Title: | Nature Communications | ||||||||||||
Publisher: | Springer Nature Ltd | ||||||||||||
ISSN: | 2041-1723 | ||||||||||||
Official Date: | 11 May 2021 | ||||||||||||
Dates: |
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Volume: | 12 | ||||||||||||
Number: | 1 | ||||||||||||
Article Number: | 2723 | ||||||||||||
DOI: | 10.1038/s41467-021-22857-y | ||||||||||||
Status: | Peer Reviewed | ||||||||||||
Publication Status: | Published | ||||||||||||
Access rights to Published version: | Open Access (Creative Commons) | ||||||||||||
Copyright Holders: | The Authors | ||||||||||||
Date of first compliant deposit: | 5 July 2021 | ||||||||||||
Date of first compliant Open Access: | 6 July 2021 | ||||||||||||
RIOXX Funder/Project Grant: |
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