Suppressed-moment 2-k order in the canonical frustrated antiferromagnet Gd<inf>2</inf>Ti<inf>2</inf>O<inf>7</inf>
Authors
Ehlers, G
Gardner, JS
Petrenko, OA
Khalyavin, DD
Manuel, P
Zhou, H
Goodwin, AL
Publication Date
2021Journal Title
npj Quantum Materials
ISSN
2397-4648
Publisher
Springer Science and Business Media LLC
Volume
6
Issue
1
Language
en
Type
Article
This Version
VoR
Metadata
Show full item recordCitation
Paddison, J., Ehlers, G., Cairns, A., Gardner, J., Petrenko, O., Butch, N., Khalyavin, D., et al. (2021). Suppressed-moment 2-k order in the canonical frustrated antiferromagnet Gd<inf>2</inf>Ti<inf>2</inf>O<inf>7</inf>. npj Quantum Materials, 6 (1) https://doi.org/10.1038/s41535-021-00391-w
Description
Funder: DOE | LDRD | Oak Ridge National Laboratory (ORNL); doi: https://doi.org/10.13039/100006228
Funder: University of Cambridge | Churchill College, University of Cambridge; doi: https://doi.org/10.13039/501100000742
Funder: European Research Council, 279705
Funder: RCUK | Science and Technology Facilities Council (STFC); doi: https://doi.org/10.13039/501100000271
Funder: NSF-DMR-1157490, State of Florida, U.S. Department of Energy
Funder: European Research Council (Ref: 279705)
Abstract
<jats:title>Abstract</jats:title><jats:p>In partially ordered magnets, order and disorder coexist in the same magnetic phase, distinct from both spin liquids and spin solids. Here, we determine the nature of partial magnetic ordering in the canonical frustrated antiferromagnet Gd<jats:sub>2</jats:sub>Ti<jats:sub>2</jats:sub>O<jats:sub>7</jats:sub>, in which Gd<jats:sup>3+</jats:sup> spins occupy a pyrochlore lattice. Using single-crystal neutron-diffraction measurements in applied magnetic field, magnetic symmetry analysis, inelastic neutron-scattering measurements, and spin-wave modeling, we show that its low-temperature magnetic structure involves two propagation vectors (2-<jats:bold>k</jats:bold> structure) with suppressed ordered magnetic moments and enhanced spin-wave fluctuations. Our experimental results are consistent with theoretical predictions of thermal fluctuation-driven order in Gd<jats:sub>2</jats:sub>Ti<jats:sub>2</jats:sub>O<jats:sub>7</jats:sub>, and reveal that inelastic neutron-scattering measurements on powder samples can solve the longstanding problem of distinguishing single-<jats:bold>k</jats:bold> and multi-<jats:bold>k</jats:bold> magnetic structures.</jats:p>
Keywords
Article, /639/766, /639/766/119/997, article
Sponsorship
RCUK | Engineering and Physical Sciences Research Council (EPSRC) (EP/G004528/2, EP/G004528/2)
Identifiers
s41535-021-00391-w, 391
External DOI: https://doi.org/10.1038/s41535-021-00391-w
This record's URL: https://www.repository.cam.ac.uk/handle/1810/331855
Rights
Licence:
http://creativecommons.org/licenses/by/4.0/
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