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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). 142902. doi:10.1063/1.4755882
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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: | Journal Article | ||||
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| Subjects: | Q Science > QC Physics Q Science > QD Chemistry |
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| Divisions: | Faculty of Science, Engineering and Medicine > Science > Chemistry Faculty of Science, Engineering and Medicine > Science > Physics |
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| 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: | 1 October 2012 | ||||
| Dates: |
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| Volume: | Vol.101 | ||||
| Number: | No.14 | ||||
| Number of Pages: | 4 | ||||
| Article Number: | 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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