2018
DOI: 10.1063/1.5022567
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Skyrmion states in thin confined polygonal nanostructures

Abstract: Recent studies have demonstrated that skyrmionic states can be the ground state in thin-film FeGe disk nanostructures in the absence of a stabilising applied magnetic field. In this work, we advance this understanding by investigating to what extent this stabilisation of skyrmionic structures through confinement exists in geometries that do not match the cylindrical symmetry of the skyrmion -such as as squares and triangles. Using simulation, we show that skyrmionic states can form the ground state for a range… Show more

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Cited by 28 publications
(30 citation statements)
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References 42 publications
(41 reference statements)
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“…The optimal arrangement of skyrmions fitting within an island clearly follows a close packing ordering of congruent circles, as has been discussed in Ref. 49 for the case of disks, and the system size affects the number of confined skyrmions, 13,16,29,49 which can be characterized by the total topological charge. Furthermore, the shape of the magnetic structures usually become distorted at the phase boundaries, in particular skyrmions, which appear as worm domains.…”
Section: B Phase Diagrammentioning
confidence: 72%
“…The optimal arrangement of skyrmions fitting within an island clearly follows a close packing ordering of congruent circles, as has been discussed in Ref. 49 for the case of disks, and the system size affects the number of confined skyrmions, 13,16,29,49 which can be characterized by the total topological charge. Furthermore, the shape of the magnetic structures usually become distorted at the phase boundaries, in particular skyrmions, which appear as worm domains.…”
Section: B Phase Diagrammentioning
confidence: 72%
“…We observe that for both states, vortex-like configurations with clear chiralities and polarisations emerge in individual layers. In the literature, the vortex-like states formed as a consequence of DM energy are also called quasi-ferromagnetic 12 , edged vortex 13 , or incomplete skyrmion 10,14,15 states. In both states we identified, the polarisation and the handedness of the vortex-like states in bottom layers are the same and related by the right hand rule - characteristic for the negative DM energy constant.…”
Section: Resultsmentioning
confidence: 99%
“…They have been predicted theoretically by Bogdanov et al [3], [4] long before their experimental detection and discovery [26,24]. In recent years magnetic skyrmions have attracted a lot of theoretical [13,22,23,39,5,21], simulation [9,18,40,32], and experimental [13,34,17,11,27] attention due to their thermodynamic and topological stability, their small size, and their inherent property of easy movement and repositioning under the application of low or even tiny in-plane electric currents. They seem promising for use in next generation spintronic devices [33,50] as information carriers, giving the credentials of ultra dense low-cost power storage and the capability to perform logical operations [12].…”
Section: Introductionmentioning
confidence: 99%