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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