Title data
Ovsyannikov, Sergey V. ; Bykov, Maxim ; Bykova, Elena ; Kozlenko, Denis P. ; Tsirlin, Alexander A. ; Karkin, Alexander E. ; Shchennikov, Vladimir V. ; Kichanov, Sergey E. ; Gou, Huiyang ; Abakumov, Artem M. ; Egoavil, Ricardo ; Verbeeck, Johan ; McCammon, Catherine ; Dyadkin, Vadim ; Chernyshov, Dmitry ; van Smaalen, Sander ; Dubrovinsky, Leonid:
Charge-ordering transition in iron oxide Fe₄O₅ involving competing dimer and trimer formation.
In: Nature Chemistry.
Vol. 8
(2016)
Issue 5
.
- pp. 501-508.
ISSN 1755-4349
DOI: https://doi.org/10.1038/nchem.2478
Project information
Project financing: |
Deutsche Forschungsgemeinschaft Alexander-von-Humboldt Forschungsgemeinschaft National Natural Science Foundation of China Russian Science Foundation Federal Ministry for Education and Research Fund for Scientific Research Flanders |
---|
Abstract in another language
Phase transitions that occur in materials, driven, for instance, by changes in temperature or pressure, can dramatically change the materials' properties. Discovering new types of transitions and understanding their mechanisms is important not only from a fundamental perspective, but also for practical applications. Here we investigate a recently discovered Fe₄O₅ that adopts an orthorhombic CaFe₃O₅-type crystal structure that features linear chains of Fe ions. On cooling below ∼ 150 K, Fe₄O₅ undergoes an unusual charge-ordering transition that involves competing dimeric and trimeric ordering within the chains of Fe ions. This transition is concurrent with a significant increase in electrical resistivity. Magnetic-susceptibility measurements and neutron diffraction establish the formation of a collinear antiferromagnetic order above room temperature and a spin canting at 85 K that gives rise to spontaneous magnetization. We discuss possible mechanisms of this transition and compare it with the trimeronic charge ordering observed in magnetite below the Verwey transition temperature.
Further data
Item Type: | Article in a journal |
---|---|
Refereed: | Yes |
Institutions of the University: | Faculties Faculties > Faculty of Mathematics, Physics und Computer Science Faculties > Faculty of Mathematics, Physics und Computer Science > Group Material Sciences Faculties > Faculty of Mathematics, Physics und Computer Science > Group Material Sciences > Chair Crystallography Faculties > Faculty of Mathematics, Physics und Computer Science > Group Material Sciences > Chair Crystallography > Chair Crystallography - Univ.-Prof. Dr. Sander van Smaalen Profile Fields > Advanced Fields > Advanced Materials Profile Fields Profile Fields > Advanced Fields |
Result of work at the UBT: | Yes |
DDC Subjects: | 500 Science > 500 Natural sciences 500 Science > 530 Physics |
Date Deposited: | 01 Dec 2016 10:38 |
Last Modified: | 01 Jun 2022 10:08 |
URI: | https://eref.uni-bayreuth.de/id/eprint/35391 |