Characterization of Nonlinear Properties of Soft PZT-Piezoceramics

摘要

We analyze dielectric data obtained on PZT-5A samples which had been electrically deaged in a well defined way. Thus the exponent #alpha# of the power law characterizing the ac-field dependence of the effective dielectric coefficient #epsilon#_(11)* could be determined with high accuracy. The result #alpha#'=1.10(1) and #alpha#"=1.07(1) obtained for the real and imaginary part of #epsilon#_(11)* respectively, confirms the non-Rayleigh type nonlinearity of soft PZT in the field range of uncorrelated domain wall motion.