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Tracking a hysteretic and disorder-broadened phase transition via the electromagnon response in improper ferroelectrics
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Mosley, C. D. W., Prabhakaran, Dharmalingham and Lloyd-Hughes, James (2018) Tracking a hysteretic and disorder-broadened phase transition via the electromagnon response in improper ferroelectrics. Journal of Physics D: Applied Physics, 51 (8). 084002. doi:10.1088/1361-6463/aaa836 ISSN 0022-3727.
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WRAP-tracking-hysteretic-disorder-broadened-phase-transition-electromagnon-Lloyd-Hughes-2017.pdf - Accepted Version - Requires a PDF viewer. Download (1798Kb) | Preview |
Official URL: https://doi.org/10.1088/1361-6463/aaa836
Abstract
We demonstrate that electromagnons can be used to directly probe the nature of a phase transition between magnetically ordered phases in an improper ferroelectric. The antiferromagnetic/paraelectric to antiferromagnetic/ferroelectric phase transition in Cu<sub>1-x</sub>Zn<sub>x</sub>O (x=0, 0.05) alloys was tracked via the electromagnon response using terahertz time-domain spectroscopy, on heating and cooling through the phase transition. The transition was found to exhibit thermal hysteresis, confirming its first-order nature, and to broaden under the influence of spin-disorder upon Zn substitution. The energy of the electromagnon increases upon alloying, as a result of the non-magnetic ions modifying the magnetic interactions that give rise to the multiferroic phase and electromagnons. We describe our findings in the context of recent theoretical work that examined improper ferroelectricity and electromagnons in CuO from phenomenological and first-principles approaches.
| 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): | Ferromagnetism, Ferroelectricity, Phase transformations (Statistical physics) | ||||||||||
| Journal or Publication Title: | Journal of Physics D: Applied Physics | ||||||||||
| Publisher: | IOP Publishing | ||||||||||
| ISSN: | 0022-3727 | ||||||||||
| Official Date: | 5 February 2018 | ||||||||||
| Dates: |
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| Volume: | 51 | ||||||||||
| Number: | 8 | ||||||||||
| Article Number: | 084002 | ||||||||||
| DOI: | 10.1088/1361-6463/aaa836 | ||||||||||
| Status: | Peer Reviewed | ||||||||||
| Publication Status: | Published | ||||||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||||||
| Description: | Part of a special issue on 'Ultrafast Spectroscopy: Applications' |
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| Date of first compliant deposit: | 18 December 2017 | ||||||||||
| Date of first compliant Open Access: | 28 March 2018 | ||||||||||
| RIOXX Funder/Project Grant: |
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