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Magnetic phases of skyrmion-hosting GaV4S8−ySey (y=0,2,4,8) probed with muon spectroscopy

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Franke, Kévin J. A., Huddart, Benjamin M., Hicken, Thomas J., Xiao, Fan, Blundell, Stephen J., Pratt, Francis L., Crisanti, Marta, Barker, Joel A. T., Clark, Stewart J., Štefančič, Aleš, Ciomaga Hatnean, Monica, Balakrishnan, Geetha and Lancaster, Tom (2018) Magnetic phases of skyrmion-hosting GaV4S8−ySey (y=0,2,4,8) probed with muon spectroscopy. Physical Review B, 98 (5). 054428. doi:10.1103/PhysRevB.98.054428 ISSN 2469-9950.

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Official URL: http://dx.doi.org/10.1103/PhysRevB.98.054428

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Abstract

We present the results of a muon-spin spectroscopy investigation of GaV4S8−ySey with y = 0, 2, 4, and 8. Zero-field measurements suggest that GaV4Se8 and GaV4S8 have distinct magnetic ground states, with the latter material showing an anomalous temperature dependence of the local magnetic field. It is not possible to evolve the magnetic state continuously between these two systems, with the intermediate y = 2 and 4 materials showing glassy magnetic behavior at low temperature. The skyrmion lattice (SkL) phase is evident in the y = 0 and 8 materials through an enhanced response of the muon-spin relaxation to the emergent dynamics that accompany the SkL. For our polycrystalline samples of GaV4Se8, this enhanced dynamic response is confined to a smaller region of the magnetic field-temperature phase diagram than the previous reports of the SkL in single crystals.

Item Type: Journal Article
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
Journal or Publication Title: Physical Review B
Publisher: American Physical Society
ISSN: 2469-9950
Official Date: 27 August 2018
Dates:
DateEvent
27 August 2018Published
27 August 2018Accepted
20 July 2018Modified
4 June 2018Submitted
Volume: 98
Number: 5
Article Number: 054428
DOI: 10.1103/PhysRevB.98.054428
Status: Peer Reviewed
Publication Status: Published
Reuse Statement (publisher, data, author rights): © 2018 American Physical Society
Access rights to Published version: Restricted or Subscription Access
Copyright Holders: American Physical Society
Date of first compliant deposit: 31 October 2018
Date of first compliant Open Access: 1 November 2018
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
UNSPECIFIED[STFC] Science and Technology Facilities Councilhttp://dx.doi.org/10.13039/501100000271
UNSPECIFIEDPaul Scherrer Instituthttp://dx.doi.org/10.13039/501100004219
UNSPECIFIEDDurham Universityhttp://dx.doi.org/10.13039/501100001314
EP/N032128/1[EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266

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