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Dielectric response and pyroelectric properties of lead-free ferroelectric Ba₃(VO₄)₂

Department of Physics, J.K.B.K. Government College, Cuttack 753004, India

Department of Physics, Institute of Technical Education and Research, Siksha O Anusandhan University, Bhubaneswar 751030, India

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Piyush R. Das

Department of Physics, Veer Surendra Sai University of Technology, Burla, Sambalpur 768018, India

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, and

B. C. Sutar

Department of Physics, Hi-Tech College Engineering, Bhubaneswar 751025, India

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https://doi.org/10.1142/S2010135X1550006XCited by:3 (Source: Crossref)

Abstract

The current paper presents results of dielectric response, pyroelectric behavior and conductivity study of lead-free ferroelectric barium orthovanadate (Ba₃(VO₄)₂ or Ba₃V₂O₈) ceramic, for a wide range of temperature and frequency. An X-ray diffraction study suggests the formation of a single-phase compound in trigonal crystal system. The SEM micrograph of gold-coated pellet sample shows well-defined and homogeneous morphology. Detailed studies of dielectric parameters (ε_r and tan δ) of the compound as a function of temperature and frequency reveal their independence over a wide range of temperature and frequency. The nature of Polarization versus electric field (P–E) hysteresis loop of Ba₃V₂O₈ at room temperature suggests its ferroelectric nature. The temperature dependence of pyroelectric coefficient and figure of merits of the sample support its dielectric response. The nature of variation of dc conductivity with temperature confirms the Arrhenius and negative temperature coefficient of resistance (NTCR) behavior of the material.

This is an Open Access article published by World Scientific Publishing Company. It is distributed under the terms of the Creative Commons Attribution 3.0 (CC-BY) License. Further distribution of this work is permitted, provided the original work is properly cited.

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