Evidence for domain-type dynamics in the ergodic phase of the PbMg1/3Nb2/3O3 relaxor ferroelectric

It was observed that the dielectric permittivity of PbMg1/3Nb2/3O3 (PMN) relaxer ceramics increases with increasing amplitude of the applied ac field. A strong nonlinearity occurs at temperatures where the frequency dispersion of the dielectric response is observed. A similarity was found between the effects of the amplitude and frequency on the permittivity. It was shown that, taken together, these data evidence that the relaxation phenomena in PMN are controlled by domain-type dynamics rather than thermally activated flips of the local spontaneous polarization.


Published in:
Physical Review B, 53, 17, 11281-11284
Year:
1996
ISSN:
0163-1829
Keywords:
Note:
Glazounov, AE Ecole Polytech Fed Lausanne,Lab Ceram,Ch-1015 Lausanne,Switzerland
Uk250
Times Cited:93
Cited References Count:14
Laboratories:




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


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