Threshold of irreversible domain wall motion in soft PZT-piezoceramic

Volkmar Mueller, Q. M. Zhang

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations


The nonlinear ac-field dependence of dielectric and piezoelectric coefficients in soft PZT piezoceramics is studied at f = 100 Hz. We demonstrate that two different thresholds for the onset of nonlinearity exist at Ec2≈1 V/cm and Ec1≈100 V/cm, respectively. At weak fields, the ac-field dependence of the effective dielectric coefficients obeys a scaling law x = x0+A[(E-Ec)/Ec]φ with the effective coefficient φ = 1.5±0.1. Above the large field threshold, both dielectric and piezoelectric coefficients exhibit a non-analytic scaling behavior. The nonlinearity is here anisotropic which is reflected by exponents φ = 1.0±0.1 and φ = 1.2±0.1 for fields parallel and perpendicular to the poling direction of the ceramic, respectively. The nonlinear domain wall response at fields well below the electrical depoling field is apparently dominated by the depinning of domain walls rather than by the anharmonicity of the potential energy of the wall.

Original languageEnglish (US)
Pages (from-to)113-122
Number of pages10
Issue number1 -4; 1-2
StatePublished - 1998
EventProceedings of the 1997 Williamsburg Workshop on Ferroelectrics - Williamsburg, VA, USA
Duration: Feb 2 1997Feb 5 1997

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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