Journal article
Single phase charge ordered stoichiometric CaFe3O5 with commensurate and incommensurate trimeron ordering
- Abstract:
- Mixed-valent transition metal compounds display complex structural, electronic and magnetic properties which can often be exquisitely tuned. Here the charge-ordered state of stoichiometric CaFe3O5 is probed using neutron powder diffraction, Monte Carlo simulation and symmetry analysis. Magnetic ordering is dominated by the formation of ferromagnetic Fe3+–Fe2+–Fe3+ trimers which are evident above the magnetic ordering transition. Between TN =289 K and 281 K an incommensurate magnetically ordered phase develops due to magnetic frustration, but a spin Jahn-Teller distortion lifts the frustration and enables the magnetic ordering to lock in to a charge-ordered commensurate state at lower temperatures. Stoichiometric CaFe3O5 exhibits single phase behaviour throughout and avoids the phase separation into two distinct crystallographic phases with different magnetic structures and Fe valence distributions reported recently, which likely occurs due to partial Fe2+ for Ca2+ substitution. This underlines the sensitivity of the magnetism and chemistry of these mixedvalent systems to composition.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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(Preview, Version of record, pdf, 2.6MB, Terms of use)
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- Publisher copy:
- 10.1038/s41467-019-13450-5
Authors
- Publisher:
- Nature Research
- Journal:
- Nature Communications More from this journal
- Volume:
- 10
- Issue:
- 2019
- Article number:
- 5475
- Publication date:
- 2019-12-02
- Acceptance date:
- 2019-11-07
- DOI:
- ISSN:
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2041-1723
- Pubs id:
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pubs:1070524
- UUID:
-
uuid:4e403fed-fbd9-467e-b956-ae76e0d2b470
- Local pid:
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pubs:1070524
- Source identifiers:
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1070524
- Deposit date:
-
2019-11-08
- ARK identifier:
Terms of use
- Copyright holder:
- Cassidy et al
- Copyright date:
- 2019
- Notes:
- © The Author(s) 2019. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
- Licence:
- CC Attribution (CC BY)
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