Dielectric properties of Sn2P2S6 crystals as a function of their growth conditions

被引：0
|
作者：
M. M. Maior
机构：
[1] Uzhgorod State University,
来源：
Physics of the Solid State | 1999年 / 41卷
关键词：
Spectroscopy; Phase Transition; State Physics; Growth Condition; Dielectric Property;
D O I：
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学科分类号：
摘要：
The behavior of the permittivity near a phase transition in Sn2P2S6 crystals of different technological quality is studied. It is established that, in high-resistance crystals, where an internal electric field is formed by the screening of spontaneous polarization in the polar phase, long-time relaxation of ɛ is observed in a temperature range ∼2 K above Tmax. This relaxation and change in the form of the maximum of ɛ′(T) at a phase transition are attributed to an internal electric field induced by the volume space charge formed in regions near the surface. It is established that the existing differences in the properties of Sn2P2S6 crystals are due to deviations from stoichiometry, arising during growth and synthesis of the crystals.
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页码：1333 / 1337
页数：4
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