Pyroelectric Response and Conduction Mechanism in Highly Crystallized Ferroelectric Sr3(VO4)2 Ceramic

被引：0
作者：
Biswajit Pati
R.N.P. Choudhary
Piyush R. Das
机构：
[1] Siksha O Anusandhan University,Department of Physics, Institute of Technical Education and Research
[2] Government Autonomous College,Department of Physics
[3] Bhawanipatna,Department of Physics
[4] Veer Surendra Sai University of Technology,undefined
[5] Burla,undefined
来源：
Journal of Electronic Materials | 2015年 / 44卷
关键词：
Ceramics; x-ray diffraction; dielectric properties; valence fluctuation; ferroelectricity;
D O I：
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中图分类号：
学科分类号：
摘要：
We present a study on the ferroelectric phase transition, pyroelectric properties, and conduction mechanism of highly crystallized strontium orthovanadate (Sr3V2O8) ceramic, prepared by a solid-state reaction technique. X-ray diffraction studies show the formation of a single-phase compound in trigonal crystal system. Detailed studies of dielectric parameters (εr and tan δ) of the compound as a function of temperature and frequency reveal their independence over a wide range of temperature and frequency. An anomaly in εr suggests the possible existence of a ferroelectric–paraelectric phase transition of diffuse type in the material, which is confirmed by electric polarization and pyroelectric studies. The low dielectric loss and moderate relative permittivity make this material (with suitable modifications) a potential candidate for use in microwave applications. The low leakage current and negative temperature coefficient of resistance (NTCR) behavior of the sample have been verified from J–E plots. The nature of the variation of the direct-current (DC) conductivity with temperature confirms the Arrhenius and NTCR behavior of the material.
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页码：313 / 319
页数：6
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