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  Bloch points in nanostrips

Lang, M., Beg, M., Hovorka, O., & Fangohr, H. (2022). Bloch points in nanostrips.

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2203.13689.pdf (Preprint), 3MB
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2203.13689.pdf
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2022
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https://arxiv.org/abs/2203.13689 (Preprint)
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 Creators:
Lang, M.1, 2, 3, Author              
Beg, M.1, 4, Author
Hovorka, O.1, Author
Fangohr, H.1, 2, 3, Author              
Affiliations:
1Faculty of Engineering and Physical Sciences, University of Southampton, ou_persistent22              
2Computational Science, Scientific Service Units, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_3267028              
3Center for Free-Electron Laser Science, Hamburg, ou_persistent22              
4Department of Earth Science and Engineering, Imperial College London, ou_persistent22              

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Free keywords: Condensed Matter, Mesoscale and Nanoscale Physics, cond-mat.mes-hall
 Abstract: Complex magnetic materials hosting topologically non-trivial particle-like objects such as skyrmions are under intensive research and could fundamentally change the way we store and process data. One important class of materials are helimagnetic materials with Dzyaloshinskii-Moriya interaction. Recently, it was demonstrated that nanodisks consisting of two layers with opposite chirality can host a single stable Bloch point of two different types at the interface between the layers. Using micromagnetic simulations we show that FeGe nanostrips consisting of two layers with opposite chirality can host multiple coexisting Bloch points in an arbitrary combination of the two different types. We show that the number of Bloch points that can simultaneously coexist depends on the strip geometry and the type of the individual Bloch points. Our simulation results allow us to predict strip geometries suitable for an arbitrary number of Bloch points. We show an example of an 80-Bloch-point configuration verifying the prediction.

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 Dates: 2022-03-25
 Publication Status: Published online
 Pages: 14
 Publishing info: -
 Table of Contents: -
 Rev. Type: No review
 Identifiers: arXiv: 2203.13689
 Degree: -

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