Contributions to the piezoelectric effect in ferroelectric single crystals and ceramics
The piezoelectric effect in ferroelectric single crystals and ceramics is investigated considering intrinsic (lattice), and extrinsic (originating mainly from displacement of domain walls) contributions. The focus of the study of intrinsic properties is on piezoelectric anisotropy, which was examined using the Landau-Ginsburg-Devonshire phenomenological theory. It is shown that the enhanced piezoelectric response along nonpolar directions, observed in many perovskite systems, is a consequence of the flattening of the Gibbs free energy profile. This flattening is common for temperature-, composition-, and external field-induced enhancement of the piezoelectric properties along nonpolar axes. A brief review of recent advances in understanding the origins of the piezoelectric nonlinearity, hysteresis, and frequency dispersion is also given.
Keywords: lead-zirconate-titanate ; morphotropic phase-boundary ; solid-solution system ; engineered domain configurations ; thermodynamic theory ; orientation dependence ; oxide ferroelectrics ; thin-films ; 0.7pb(mg1/3nb2/3)o-3-0.3pbtio(3) crystals ; electromechanical properties
Damjanovic, D Ecole Polytech Fed Lausanne, Mat Sci & Engn Inst, Ceram Lab, CH-1015 Lausanne, Switzerland Ecole Polytech Fed Lausanne, Mat Sci & Engn Inst, Ceram Lab, CH-1015 Lausanne, Switzerland
Cited References Count:105
Record created on 2006-08-21, modified on 2016-08-08