Dielectric and piezoelectric properties and electrical conductivity of LiNbO3:ZnO crystals in a wide range of dopant concentrations

被引：0
|
作者：
M. N. Palatnikov
V. A. Sandler
N. V. Sidorov
I. V. Biryukova
O. V. Makarova
机构：
[1] Russian Academy of Sciences,Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, Kola Scientific Center
来源：
Inorganic Materials | 2016年 / 52卷
关键词：
single crystals; piezoelectric modulus; doping; threshold concentration; unipolarity;
D O I：
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中图分类号：
学科分类号：
摘要：
The dielectric and piezoelectric properties and electrical conductivity of initially multidomain LiNbO3:ZnO crystals have been studied in a wide range of dopant concentrations with the aim of determining the composition range of the anomalous increase in unipolarity. The results demonstrate that the development of spontaneous unipolarity during high-temperature annealing takes place only in LiNbO3:ZnO crystals grown from melts in a “near-threshold” composition range (~5.4 < Cm ≤ 6.76 mol % ZnO). The effect is accompanied by a considerable and reproducible increase in the static piezoelectric modulus d333. The increase in the piezoelectric modulus, Δd333, rises linearly with increasing jump in electrical conductivity, Δσ, near a temperature T* ≈ 800 K.
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页码：1291 / 1296
页数：5
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