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.
Mr Luke Alexander Turnbull firstname.lastname@example.org
PGR Student Doctor of Philosophy
Professor Peter Hatton email@example.com
G. van der Laan
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.
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|
|Deposit Date||Sep 2, 2021|
|Publicly Available Date||Sep 2, 2021|
|Peer Reviewed||Peer Reviewed|
Published Journal Article (Advance online version)
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