Dielectric non-linearity and the nature of polarization response of PbMg1/3Nb2/3O3 relaxor ferroelectric
We investigate the non-linear dielectric properties of PbMg1/3Nb2/3O3 (PMN) single crystals and present the following experimental evidence: (a) the absence of the anomaly in the temperature dependence of non-linear coefficients in the relationship between the electric field and polarization, E(P); (b) large difference between the "ac" and "dc" non-linear effects; (c) non-analytical behavior of non-linear dielectric response and the crossover in its field exponents. The fact (a) clearly evidences against the glassy behavior of PMN. The results (b) and (c) can be understood using the model of the interphase boundary motion in PMN.
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Tagantsev, AK Ecole Polytech Fed Lausanne, Lab Ceram, CH-1015 Lausanne, Switzerland Ecole Polytech Fed Lausanne, Lab Ceram, CH-1015 Lausanne, Switzerland
Part 3 Suppl. S
Cited References Count:19
Record created on 2006-08-21, modified on 2016-08-08