Field and temperature dependence of Piezoelectric moduli of ferroelectrics

Abstract
Results of investigations on electro-mechanical properties of some ferroelectrics (relaxor ferroelectrics. modified PZT ceramics, BaTi03 and TGS) in dependence on the strength of a bias field are presented. Piezoelectric dmnmoduli were measured by means of a micro-displacement meter. In most cases the absolute value of dmn is least at the peak value of the bias field E and increases with decreasing E. The results are discussed in terms of domain-wall and phase- boundary effects.

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