Beanland, Richard. (2011) Structure of planar defects in tilted perovskites. Acta Crystallographica Section A Foundations of Crystallography, Vol.67 (No.3). pp. 191-199. ISSN 0108-7673

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Abstract

A mathematical framework is developed to describe tilted perovskites using a tensor description of octahedral deformations. The continuity of octahedral tilts through the crystal is described using an operator which relates the deformations of adjacent octahedra; examination of the properties of this operator upon application of symmetry elements allows the space group of tilted perovskites to be obtained. It is shown that the condition of octahedral continuity across a planar defect such as an anti-phase boundary or domain wall necessarily leads to different octahedral tilting at the defect, and a method is given to predict the local tilt system which will occur in any given case. Planar boundaries in the rhombohedral R3c a - a - a - tilt system are considered as an example.

Item Type:	Journal Article
Divisions:	Faculty of Science > Physics
Journal or Publication Title:	Acta Crystallographica Section A Foundations of Crystallography
Publisher:	Wiley-Blackwell Publishing, Inc.
ISSN:	0108-7673
Date:	2011
Volume:	Vol.67
Number:	No.3
Page Range:	pp. 191-199
Identification Number:	10.1107/S0108767311002042
Status:	Peer Reviewed
Publication Status:	Published
URI:	http://wrap.warwick.ac.uk/id/eprint/41828

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