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Existence and stability of skyrmion bags in thin magnetic films

Kind, Charles, Friedemann, Sven and Read, Dan 2020. Existence and stability of skyrmion bags in thin magnetic films. Applied Physics Letters 116 (2) , 022413. 10.1063/1.5127173
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Abstract

Skyrmion bags are spin textures of any integer topological degree, realized in micromagnetic simulations and experimentally in liquid crystals. They have been proposed as a promising new form of magnetic data storage due to their stability with respect to perturbations and the possibility of encoding different values in topologically distinct magnetization configurations. We simulate skyrmion bags in magnetic thin films having a range of physically realistic material parameters. The results give a range over which stable skyrmion bags may be found in experiment, and we extract a relationship to help guide the production of these potentially useful quasiparticles. Individual magnetic skyrmions are stable, particle-like, spin configurations in the magnetization of chiral magnets.1 Their stability is derived from the skyrmion's topological nature. A single skyrmion in the continuous model is a perfect cover of the two-sphere, illustrated in Fig. 1(c), and hence impossible to unwind. This stability, coupled with the low currents required to move them, makes them seem to be attractive as candidates for future forms of magnetic data storage with read-write capabilities.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Publisher: AIP Publishing
ISSN: 0003-6951
Date of First Compliant Deposit: 21 January 2020
Date of Acceptance: 16 December 2019
Last Modified: 06 Jul 2020 12:15
URI: http://orca-mwe.cf.ac.uk/id/eprint/128854

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