Maghemite-like regions at crossing of two antiphase boundaries in doped BiFeO3

Salih, J.M., Wang, L., Ramasse, Q.M., Jones, L., Barthel, J., Reaney, I.M., Craven, A.J. and MacLaren, I. (2016) Maghemite-like regions at crossing of two antiphase boundaries in doped BiFeO3. Materials Science and Technology, 32(3), pp. 242-247. (doi:10.1179/1743284715Y.0000000115)

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Abstract

We report the observation of a novel structure at the point where two antiphase boundaries cross in a doped bismuth ferrite of composition (Bi0.85Nd0.15)(Fe0.9Ti0.1)O0.3. The structure was investigated using a combination of high angle annular dark field imaging and electron energy loss spectroscopy spectrum imaging in the scanning transmission electron microscope. A three-dimensional model was constructed by combining the position and chemistry data with previous results and assuming octahedral coordination of all Fe and Ti atoms. The resulting structure shows some novel L shaped arrangements of iron columns, which are coordinated in a similar manner to FeO6 octahedra in maghemite. It is suggested that this may lead to local ferromagnetic orderings similar to those in maghemite.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:MacLaren, Dr Ian and Craven, Professor Alan
Authors: Salih, J.M., Wang, L., Ramasse, Q.M., Jones, L., Barthel, J., Reaney, I.M., Craven, A.J., and MacLaren, I.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Materials Science and Technology
Publisher:Maney Publishing
ISSN:0267-0836
ISSN (Online):1743-2847
Published Online:06 March 2016
Copyright Holders:Copyright © 2016 The Authors
First Published:First published in Materials Science and Technology 32(3):242-247
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
539401Using aberration corrected STEM to study the atomic structure of incommensurate antiferroelectricsIan MaclarenEngineering & Physical Sciences Research Council (EPSRC)EP/I000879/1P&A - PHYSICS & ASTRONOMY