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Mechanisms of electromechanical response in (1 − x)Ba(Zr0.2Ti0.8)O3- x(Ba0.7Ca0.3)TiO3 ceramics

Acosta, Matias and Novak, Nikola and Rossetti Jr., George A. and Rödel, Jürgen (2015):
Mechanisms of electromechanical response in (1 − x)Ba(Zr0.2Ti0.8)O3- x(Ba0.7Ca0.3)TiO3 ceramics.
In: Applied Physics Letters, AIP Publishing, (107), [Online-Edition: http://dx.doi.org/10.1063/1.4932654],
[Article]

Abstract

Contributions to the piezoelectric response of (1-x)Ba(Zr0.2Ti0.8)O3-x(Ba0.7Ca0.3)TiO3 ceramics are quantified by small signal measurements made as functions of bias field and temperature. The highest fraction of intrinsic contributions is observed far from phase boundaries, of extrinsic contributions around phase boundaries, and of irreversible switching in the orthorhombic phase. The largest piezoelectric response, d33=475±85pC/N, is found near the orthorhombic to tetragonal phase boundary due to both reversible and irreversible switching. A peak in reversible switching above the Curie temperature for all compositions suggests a line of critical points associated with first order phase transitions, indicating that concurrence of triple and tricritical points in the zero-field phase diagram is not the responsible mechanism of enhanced piezoelectricity.

Item Type: Article
Erschienen: 2015
Creators: Acosta, Matias and Novak, Nikola and Rossetti Jr., George A. and Rödel, Jürgen
Title: Mechanisms of electromechanical response in (1 − x)Ba(Zr0.2Ti0.8)O3- x(Ba0.7Ca0.3)TiO3 ceramics
Language: English
Abstract:

Contributions to the piezoelectric response of (1-x)Ba(Zr0.2Ti0.8)O3-x(Ba0.7Ca0.3)TiO3 ceramics are quantified by small signal measurements made as functions of bias field and temperature. The highest fraction of intrinsic contributions is observed far from phase boundaries, of extrinsic contributions around phase boundaries, and of irreversible switching in the orthorhombic phase. The largest piezoelectric response, d33=475±85pC/N, is found near the orthorhombic to tetragonal phase boundary due to both reversible and irreversible switching. A peak in reversible switching above the Curie temperature for all compositions suggests a line of critical points associated with first order phase transitions, indicating that concurrence of triple and tricritical points in the zero-field phase diagram is not the responsible mechanism of enhanced piezoelectricity.

Journal or Publication Title: Applied Physics Letters
Number: 107
Publisher: AIP Publishing
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 12 Oct 2015 12:22
Official URL: http://dx.doi.org/10.1063/1.4932654
Identification Number: doi:10.1063/1.4932654
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