Phenomenological model of dynamic nonlinear response of relaxer ferroelectrics
A phenomenological model was proposed which describes frequency dispersion of nonlinear dielectric response of relaxer ferroelectrics (relaxors) as a result of dispersion of their linens dielectric permittivity. The model was applied to Pb(Mg1/3Nb2/3)O-3 (PMN) relaxer. It provided a good qualitative description of temperature and frequency dependence of the third harmonics of PMN. Analysis within the model yielded a frequency independent nonlinear coefficient corresponding: to static nonlinear dielectric susceptibility. The model explained the recently reported for PMN data on the Vogel-Fulcher law for frequency dependence of the temperature at which the third harmonics passes a maximum.
Glazounov, AE Univ Karlsruhe, Inst Ceram Mech Engn, D-76131 Karlsruhe, Germany Univ Karlsruhe, Inst Ceram Mech Engn, D-76131 Karlsruhe, Germany Swiss Fed Inst Technol, Ceram Lab, EPFL, CH-1015 Lausanne, Switzerland
Cited References Count:20
Record created on 2006-08-21, modified on 2016-08-08