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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
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 | ||||
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| 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: |
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| 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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