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Piezoelectricity and rotostriction through polar and non-polar coupled instabilities in bismuth-based piezoceramics

Acosta, Matias and Schmitt, Ljubomira A. and Cazorla, Claudio and Studer, Andrew and Zintler, Alexander and Glaum, Julia and Kleebe, Hans-Joachim and Donner, Wolfgang and Hoffman, Mark and Rödel, Jürgen and Hinterstein, Manuel (2016):
Piezoelectricity and rotostriction through polar and non-polar coupled instabilities in bismuth-based piezoceramics.
In: Scientific Reports, Nature Research, pp. 10.1063/1.4936784, 6, (1), ISSN 2045-2322, [Online-Edition: https://doi.org/10.1038/srep28742],
[Article]

Abstract

Coupling of order parameters provides a means to tune functionality in advanced materials including multiferroics, superconductors, and ionic conductors. We demonstrate that the response of a frustrated ferroelectric state leads to coupling between order parameters under electric field depending on grain orientation. The strain of grains oriented along a specific crystallographic direction, 〈h00〉, is caused by converse piezoelectricity originating from a ferrodistortive tetragonal phase. For 〈hhh〉 oriented grains, the strain results from converse piezoelectricity and rotostriction, as indicated by an antiferrodistortive instability that promotes octahedral tilting in a rhombohedral phase. Both strain mechanisms combined lead to a colossal local strain of (2.4 ± 0.1) % and indicate coupling between oxygen octahedral tilting and polarization, here termed “rotopolarization”. These findings were confirmed with electromechanical experiments, in situ neutron diffraction, and in situ transmission electron microscopy in 0.75Bi1/2Na1/2TiO3-0.25SrTiO3. This work demonstrates that polar and non-polar instabilities can cooperate to provide colossal functional responses.

Item Type: Article
Erschienen: 2016
Creators: Acosta, Matias and Schmitt, Ljubomira A. and Cazorla, Claudio and Studer, Andrew and Zintler, Alexander and Glaum, Julia and Kleebe, Hans-Joachim and Donner, Wolfgang and Hoffman, Mark and Rödel, Jürgen and Hinterstein, Manuel
Title: Piezoelectricity and rotostriction through polar and non-polar coupled instabilities in bismuth-based piezoceramics
Language: English
Abstract:

Coupling of order parameters provides a means to tune functionality in advanced materials including multiferroics, superconductors, and ionic conductors. We demonstrate that the response of a frustrated ferroelectric state leads to coupling between order parameters under electric field depending on grain orientation. The strain of grains oriented along a specific crystallographic direction, 〈h00〉, is caused by converse piezoelectricity originating from a ferrodistortive tetragonal phase. For 〈hhh〉 oriented grains, the strain results from converse piezoelectricity and rotostriction, as indicated by an antiferrodistortive instability that promotes octahedral tilting in a rhombohedral phase. Both strain mechanisms combined lead to a colossal local strain of (2.4 ± 0.1) % and indicate coupling between oxygen octahedral tilting and polarization, here termed “rotopolarization”. These findings were confirmed with electromechanical experiments, in situ neutron diffraction, and in situ transmission electron microscopy in 0.75Bi1/2Na1/2TiO3-0.25SrTiO3. This work demonstrates that polar and non-polar instabilities can cooperate to provide colossal functional responses.

Journal or Publication Title: Scientific Reports
Volume: 6
Number: 1
Publisher: Nature Research
Divisions: 11 Department of Materials and Earth Sciences > Earth Science > Geo-Material-Science
11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
11 Department of Materials and Earth Sciences > Material Science > Structure Research
11 Department of Materials and Earth Sciences > Earth Science
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 11 Jul 2017 11:41
Official URL: https://doi.org/10.1038/srep28742
Identification Number: doi:10.1038/srep28742
Funders: The work and the in situ TEM experiments were supported by the Deutsche Forschungsgemeinschaft (DFG) Leibniz program under RO954/22-1, Emmy Noether Research Group HI1867/1-1 and SFB595., Further founds were obtained from the Bundesministerium fuer Bildung und Forschung (BMBF) (Grant No. 05K13VK1), the Feodor Lynen Research Fellowship Program of the Alexander von Humboldt Foundation., Further founds were obtained from the EU call H2020-MSCA-IF-2014 under grant number 655866 and the Australian Research Council under grant numbers DP150104649, DE120102644, DE150100750, and FT140100135.
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