O'Brien, Aoife, Woodward, David I., Sardar, Kripasindhu, Walton, Richard I. and Thomas, Pam A. (2012) Inference of oxygen vacancies in hydrothermal Na0.5Bi0.5TiO3. Applied Physics Letters, Vol.101 (No.14). p. 142902. doi:10.1063/1.4755882

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Abstract

A high-resolution x-ray powder diffraction study has been made of pseudo-rhombohedral and tetragonal phases in Na0.5Bi0.5TiO3 (NBT), produced via hydrothermal and conventional solidstate methods. Hydrothermal NBT exhibits significantly greater structural distortion at room
temperature than solid-state NBT. Peak widths and superstructure peak intensities show a phase
transition at 305 C, with trends suggesting that the structure tends towards cubic symmetry at this temperature. Structural refinements indicate that the transition occurs via a phase coexistence region with no clear intermediate phase. Piezoelectric data show evidence of polarisation pinning in hydrothermal NBT, interpreted as a high proportion of oxygen vacancies.

Item Type:	Submitted Journal Article
Subjects:	Q Science > QC Physics Q Science > QD Chemistry
Divisions:	Faculty of Science > Chemistry Faculty of Science > Physics
Library of Congress Subject Headings (LCSH):	Perovskite -- Analysis
Journal or Publication Title:	Applied Physics Letters
Publisher:	American Institute of Physics
ISSN:	1077-3118
Official Date:	2012
Dates:	Date Event 2012 Published
Volume:	Vol.101
Number:	No.14
Number of Pages:	4
Page Range:	p. 142902
DOI:	10.1063/1.4755882
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Funder:	Advantage West Midlands (AWM), European Regional Development Fund (ERDF), Birmingham Science City

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