Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/3268
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Title: Simulation of electromechanical responses of ferroelectric ceramics driven by alternating compressive stress and static electric field
Authors: Chow, CK
Lo, VC
Issue Date: 15-Nov-2008
Source: Journal of applied physics, 15 Nov. 2008, v. 104, no. 10, 103513, p. 1-6
Abstract: The effect of static electric field on mechanical and dielectric properties of a lead zirconate titanate (PbZr[sub x]Ti[sub 1-x]O₃) piezoceramic sample driven by an alternating compressive stress has been experimentally investigated by Zhou et al. [J. Am. Ceram. Soc. 88, 867 (2005)]. Numerical simulation for this experimental result using two-dimensional four-state Potts model is presented in this article. Upon polarization switching, the dipole in the perovskite cell undergoes 90° rotation, which is in turn associated with the switching of ferroelastic strain state. Consequently, the stress-strain relation and hence the mechanical stiffness are strongly influenced by the magnitude of the dc bias. Optimal mechanical and piezoelectric responses can be obtained by the suitable selection of biasing field.
Keywords: Dielectric polarisation
Ferroelasticity
Ferroelectric ceramics
Ferroelectric switching
Lead compounds
Piezoceramics
Piezoelectricity
Potts model
Stress-strain relations
Publisher: American Institute of Physics
Journal: Journal of applied physics 
ISSN: 0021-8979
EISSN: 1089-7550
DOI: 10.1063/1.3026537
Rights: © 2008 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in S.C.K. Chow & V.C. Lo, J. Appl. Phys. 104, 103513 (2008) and may be found at http://jap.aip.org/resource/1/japiau/v104/i10/p103513_s1.
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