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  4. Correlation between dielectric anisotropy and positive or zero transverse piezoelectric coefficients in perovskite ferroelectric single crystals
 
research article

Correlation between dielectric anisotropy and positive or zero transverse piezoelectric coefficients in perovskite ferroelectric single crystals

Davis, M.  
•
Damjanovic, D.  
•
Setter, N.  
2005
Applied Physics Letters

The transverse piezoelectric coefficient (d(31)(star)) has been calculated for tetragonal barium titanate (BT) and lead titanate (PT) cut along nonpolar axes, over a range of temperatures, using the phenomenological Landau-Ginzburg-Devonshire theory. It is shown that negative values of d(31)(star) are favored when the transverse dielectric susceptibility eta(11) and shear coefficient d(15) are large, such that polarization rotation is more significant than the collinear piezoelectric effect. This occurs in tetragonal BT close to its ferroelectric-ferroelectric phase transition to an orthorhombic phase. In PT, however, where no phase transition occurs, d(15) is small and polarization "extension" due to d(33) dominates: small or positive values of d(31)(star) become prominent. This extends a previous result found for polycrystalline modified PT ceramics. (c) 2005 American Institute of Physics.

  • Details
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Type
research article
DOI
10.1063/1.2041827
Web of Science ID

WOS:000231614800043

Author(s)
Davis, M.  
Damjanovic, D.  
Setter, N.  
Date Issued

2005

Published in
Applied Physics Letters
Volume

87

Issue

10

Article Number

102904

Subjects

orientation dependence

•

titanate ceramics

•

barium-titanate

•

temperature

Note

Davis, M Ecole Polytech Fed Lausanne, Ceram Lab, Lausanne, Switzerland Ecole Polytech Fed Lausanne, Ceram Lab, Lausanne, Switzerland

960SZ

Cited References Count:21

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LC  
Available on Infoscience
August 21, 2006
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/233559
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