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Stability and Metastability of Skyrmions in Thin Lamella of Cu2OSeO3 [dataset] Open Access

We report small angle X-ray scattering (SAXS) measurements of the skyrmion lattice in two 200 nm thick Cu2OSeO3 lamellae aligned with the applied magnetic field parallel to the out of plane [110] or [100] crystallographic directions. Our measurements show that the equilibrium skyrmion phase in both samples is expanded significantly compared to bulk crystals, existing between approximately 30 and 50~K over a wide region of magnetic field. This skyrmion state is elliptically distorted at low fields for the [110] sample, and symmetric for the [100] sample, possibly due to crystalline anisotropy becoming more important at this sample thickness than it is in bulk samples. Furthermore, we find that a metastable skyrmion state can be observed at low temperature by field cooling through the equilibrium skyrmion pocket in both samples. In contrast to the behavior in bulk samples, the volume fraction of metastable skyrmions does not significantly depend on cooling rate. We show that a possible explanation for this is the change in the lowest temperature of the skyrmion state in this lamellae compared to bulk, without requiring different energetics of the skyrmion state.

Descriptions

Resource type
Dataset
Contributors
Creator: Wilson, M.N. 1
Contact person: Wilson, M.N. 1
Creator: Birch, M.T. 1
Creator: Štefančič, A. 2
Creator: Twitchett-Harrison, A.C. 3
Creator: Balakrishnan, G. 4
Creator: Hicken, T.J. 1
Creator: Fan, R. 5
Creator: Steadman, P. 5
Creator: Hatton, P.D. 6
1 Durham University, UK
2 University of Warwick, UK
3 University of Cambridge, UK
4 University of Warwick
5 Diamond Light Source, UK
6 Durham University
Funder
EPSRC Skyrmion Project EP/N032128/1
Research methods
Other description
Keyword
Strongly Correlated Electrons
Materials Science
Subject
Location
Language
Cited in
arxiv:1909.07855v1
Identifier
ark:/32150/r1bk1289900
doi:10.15128/r1bk1289900
Rights
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA)

Publisher
Durham University
Date Created

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M.N. Wilson
Date Uploaded
Date Modified
16 December 2019, 14:12:07
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File format: zip (ZIP Format)
Mime type: application/zip
File size: 2586702475
Last modified: 2019:12:11 18:39:13+00:00
Filename: DataCollection.zip
Original checksum: 571e9d819a3ca7d8340c7f896dc81660
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User N. Syrotiuk has updated Stability and Metastability of Skyrmions in Thin Lamella of Cu2OSeO3 [dataset] 6 months ago
User M.N. Wilson has updated Stability and Metastability of Skyrmions in Thin Lamella of Cu2OSeO3 [dataset] 6 months ago
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