作者: I A Santos , J A Eiras
DOI: 10.1088/0953-8984/13/50/333
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摘要: Features of the diffuse phase transition in lead magnesium niobate and strontium barium niobate, typical relaxor ferroelectric materials, were studied as a function temperature frequency. A new empirical equation for phenomenological description dependence dielectric permittivity (e') peak is proposed. In fact, proposed provides an excellent fitting experimental curves at temperatures into above dispersion region, enabling us to calculate some characteristic parameters transitions materials.