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Magnetism and Néel skyrmion dynamics in GaV4S8−ySey
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Hicken, T. J., Holt, S. J. R., Franke, K. J. A., Hawkhead, Z., Štefančič, Aleš, Wilson, M. N., Gomilšek, M., Huddart, B. M., Clark, S. J., Lees, Martin R., Pratt, F. L., Blundell, S. J., Balakrishnan, Geetha and Lancaster, T. (2020) Magnetism and Néel skyrmion dynamics in GaV4S8−ySey. Physical Review Research, 2 (3). 032001(R). doi:10.1103/PhysRevResearch.2.032001
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WRAP-Magnetism-N´eel-skyrmion-dynamics-GaV4S8−ySey-Holt-2020.pdf - Accepted Version - Requires a PDF viewer. Available under License Creative Commons Attribution 4.0. Download (1235Kb) | Preview |
Official URL: http://dx.doi.org/10.1103/PhysRevResearch.2.032001
Abstract
We present an investigation of the influence of low levels of chemical substitution on the magnetic ground state and Néel skyrmion lattice (SkL) state in GaV4S8-ySey, where y = 0, 0.1, 7.9, and 8. Muon-spin spectroscopy (μSR) measurements on y = 0 and 0.1 materials reveal the magnetic ground state consists of microscopically coexisting incommensurate cycloidal and ferromagnetic environments, whereas chemical substitution leads to the growth of localized regions of increased spin density. μSR measurements of emergent low-frequency skyrmion dynamics show that the SkL exists under low levels of substitution at both ends of the series. Skyrmionic excitations persist to temperatures below the equilibrium SkL in substituted samples, suggesting the presence of skyrmion precursors over a wide range of temperatures.
| Item Type: | Journal Article | ||||||||||
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| Subjects: | Q Science > QC Physics | ||||||||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||||
| Library of Congress Subject Headings (LCSH): | Skyrme model , Muon spin rotation, Lattice dynamics | ||||||||||
| Journal or Publication Title: | Physical Review Research | ||||||||||
| Publisher: | American Physical Society | ||||||||||
| ISSN: | 2643-1564 | ||||||||||
| Official Date: | 1 July 2020 | ||||||||||
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| Volume: | 2 | ||||||||||
| Number: | 3 | ||||||||||
| Article Number: | 032001(R) | ||||||||||
| DOI: | 10.1103/PhysRevResearch.2.032001 | ||||||||||
| Status: | Peer Reviewed | ||||||||||
| Publication Status: | Published | ||||||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||||||
| Copyright Holders: | The Authors | ||||||||||
| RIOXX Funder/Project Grant: |
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| Open Access Version: |
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