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Inference of oxygen vacancies in hydrothermal Na0.5Bi0.5TiO3

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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. ISSN 1077-3118

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Official URL: http://dx.doi.org/10.1063/1.4755882

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:

Page Range:

p. 142902

Identification Number:

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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