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Synthesis, structural and magnetic characterisation of the fully fluorinated compound 6H-BaFeO2F

Clemens, O and Wright, Adrian J. and Berry, Frank J. and Smith, Ronald and Slater, Peter.R. (2013) Synthesis, structural and magnetic characterisation of the fully fluorinated compound 6H-BaFeO2F. Journal of Solid State Chemistry.

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Identification Number/DOI: 10.1016/j.jssc.2012.10.017

The compound 6H-BaFeO2F (P63/mmc) was synthesised by the low temperature fluorination of 6H-BaFeO3-d using polyvinylidenedifluoride (PVDF) as a fluorination
agent. Structural characterisation by XRD and NPD suggests that the local positions of the oxygen and fluorine atoms vary with no evidence for ordering on the anion sites. This compound shows antiferromagnetic ordering at room temperature with antiparallel alignment of the magnetic moments along the c-axis. The use of PVDF also allows the possibility of tuning the fluorine content in materials of composition 6H-BaFeO3-dFy to any value of 0 < y ≤ 1. In addition, the oxygen content, and therefore the iron oxidation state, can be tuned by applying different partial pressures of oxygen during the reaction.

Type of Work:Article
Date:01 February 2013 (Publication)
School/Faculty:Colleges (2008 onwards) > College of Engineering & Physical Sciences
Department:Chemistry
Keywords:perovskite, fluoride, neutron diffraction, magnetism
Subjects:QC Physics
QD Chemistry
Institution:University of Birmingham
Copyright Holders:Elsevier
ID Code:1411
Refereed:YES
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