Ferroelectric phase transitions in Pb0.96Ba0.04Sc0.5Nb0.5O3 and Pb0.94Ba0.06Sc0.5Nb0.5O3 solid-solution single crystals

被引：0
|
作者：
L. S. Kamzina
I. P. Raevskii
V. V. Eremkin
V. G. Smotrakov
机构：
[1] Russian Academy of Sciences,Ioffe Physicotechnical Institute
[2] Rostov State University,Institute of Physics
来源：
Physics of the Solid State | 2002年 / 44卷
关键词：
Phase Transition; Optical Transmission; Sharp Change; Narrow Peak; Scattering Intensity;
D O I：
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中图分类号：
学科分类号：
摘要：
The optical properties of Pb0.96Ba0.04Sc0.5Nb0.5O3 (PBSN-4) and Pb0.94Ba0.06Sc0.5Nb0.5O3 (PBSN-6) single-crystal solid solutions were studied for the first time. It was shown that the spontaneous phase transition occurring in PBSN-4 with no electric field present is accompanied by a sharp minimum in optical transmission, which indicates the percolation nature of the transition. No sharp changes were observed in the temperature dependence of optical transmission in PBSN-6 single crystals with no electric field applied. However, a very weak electric field, ∼0.4 kV/cm, is sufficient to induce the ferroelectric state in PBSN-6 single crystals. It was shown that the destruction of the induced ferroelectric state is a first-order phase transition which is accompanied by an anomalously narrow peak in the small-angle light scattering intensity (or by a minimum in optical transmission) and occurs through the percolation mechanism.
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页码：1754 / 1758
页数：4
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