The ß-to-? Transition in BiFeO3: A Powder Neutron Diffraction Study

Arnold, Donna C. and Knight, Kevin S. and Catalan, Gustau and Redfern, Simon A. T. and Scott, James and Lightfoot, Philip and Morrison, Finlay D. (2010) The ß-to-? Transition in BiFeO3: A Powder Neutron Diffraction Study. Advanced Functional Materials, 20 (13). pp. 2116-2123. ISSN 1616-3028. (doi:https://doi.org/10.1002/adfm.201000118) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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Official URL
http://dx.doi.org/10.1002/adfm.201000118

Abstract

High-temperature powder neutron diffraction experiments are conducted around the reported β–γ phase transition (∼930 °C) in BiFeO3. The results demonstrate that while a small volume contraction is observed at the transition temperature, consistent with an insulator–metal transition, both the β- and γ-phase of BiFeO3 exhibit orthorhombic symmetry; i.e., no further increase of symmetry occurs during this transition. The γ-orthorhombic phase is observed to persist up to a temperature of approximately 950 °C before complete decomposition into Bi2Fe4O9 (and liquid Bi2O3), which subsequently begins to decompose at approximately 960 °C.

Item Type: Article
Uncontrolled keywords: Ferroics; Structure–Property Relationships
Subjects: Q Science > QC Physics > QC176 Solid state physics
Q Science > QC Physics
Divisions: Faculties > Sciences > School of Physical Sciences
Depositing User: Stewart Brownrigg
Date Deposited: 07 Mar 2014 00:05 UTC
Last Modified: 13 Apr 2016 11:47 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/40384 (The current URI for this page, for reference purposes)
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