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.


Published in:
Physical Review Letters, 85, 10, 2192-2195
Year:
2000
ISSN:
0031-9007
Keywords:
Note:
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
349VC
Times Cited:46
Cited References Count:20
Laboratories:




 Record created 2006-08-21, last modified 2018-03-17


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