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

Acosta, Matias ; Schmitt, Ljubomira A. ; Cazorla, Claudio ; Studer, Andrew ; Zintler, Alexander ; Glaum, Julia ; Kleebe, Hans‐Joachim ; Donner, Wolfgang ; Hoffman, Mark ; Rödel, Jürgen ; Hinterstein, Manuel (2022):
Piezoelectricity and rotostriction through polar and non-polar coupled instabilities in bismuth-based piezoceramics. (Publisher's Version)
In: Scientific Reports, 6 (1), Springer Nature, e-ISSN 2045-2322,
DOI: 10.26083/tuprints-00020489,
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Item Type: Article
Origin: Secondary publication service
Status: Publisher's Version
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 of the journal: 6
Issue Number: 1
Publisher: Springer Nature
Collation: 8 Seiten
Classification DDC: 500 Naturwissenschaften und Mathematik > 550 Geowissenschaften
600 Technik, Medizin, angewandte Wissenschaften > 600 Technik
Divisions: 11 Department of Materials and Earth Sciences > Earth Science > Geo-Material-Science
11 Department of Materials and Earth Sciences > Material Science > Structure Research
Date Deposited: 16 Feb 2022 13:26
Last Modified: 16 Feb 2022 13:26
DOI: 10.26083/tuprints-00020489
Corresponding Links:
URN: urn:nbn:de:tuda-tuprints-204891
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/20489
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