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Bifurcated polarization rotation in bismuth-based piezoelectrics

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Keeble, Dean Samuel, Barney, Emma R., Keen, David A., Tucker, Matthew G., Kreisel, J. (Jens) and Thomas, Pam A. (2013) Bifurcated polarization rotation in bismuth-based piezoelectrics. Advanced Functional Materials, Volume 23 (Number 2). pp. 185-190. doi:10.1002/adfm.201201564

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Official URL: http://dx.doi.org/10.1002/adfm.201201564

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Abstract

ABO3 perovskite-type solid solutions display a large variety of structural and physical properties, which can be tuned by chemical composition or external parameters such as temperature, pressure, strain, electric, or magnetic fields. Some solid solutions show remarkably enhanced physical properties including colossal magnetoresistance or giant piezoelectricity. It has been recognized that structural distortions, competing on the local level, are key to understanding and tuning these remarkable properties, yet, it remains a challenge to experimentally observe such local structural details. Here, from neutron pair-distribution analysis, a temperature-dependent 3D atomic-level model of the lead-free piezoelectric perovskite Na0.5Bi0.5TiO3 (NBT) is reported. The statistical analysis of this model shows how local distortions compete, how this competition develops with temperature, and, in particular, how different polar displacements of Bi3+ cations coexist as a bifurcated polarization, highlighting the interest of Bi-based materials in the search for new lead-free piezoelectrics.

Item Type: Journal Article
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Physics
Library of Congress Subject Headings (LCSH): Oscillators, Crystal, Piezoelectric devices, Bifurcation theory, Statistics, Bismuth
Journal or Publication Title: Advanced Functional Materials
Publisher: Wiley - V C H Verlag GmbH & Co. KGaA
ISSN: 1616-301X
Official Date: 2013
Dates:
DateEvent
2013Published
Volume: Volume 23
Number: Number 2
Page Range: pp. 185-190
DOI: 10.1002/adfm.201201564
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
Funder: Science City Research Alliance, Higher Education Funding Council for England (HEFCE), University of Warwick. Institute of Advanced Study, Coopérations et mobilités internationales Rhône-Alps (CMIRA)

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