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Journal of Advanced Ceramics 2014, 3(4): 339-348 https://doi.org/10.1007/s40145-014-0126-9
Research Article | Open Access | Issue | Published: 30 November 2014

Glassy behavior study of dysprosium doped barium zirconium titanate relaxor ferroelectric

Show Author's Information Tanmaya BADAPANDA( )
Department of Physics, CV Raman College of Engineering, Bhubaneswar, Odisha-752054, India
Keywords:
dielectric properties, diffuse phase transition, transition temperature, relaxors, polar nano-regions
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BADAPANDA T. Glassy behavior study of dysprosium doped barium zirconium titanate relaxor ferroelectric. Journal of Advanced Ceramics, 2014, 3(4): 339-348. https://doi.org/10.1007/s40145-014-0126-9
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Abstract Full text About this article

We report the glassy behavior of dysprosium doped barium zirconium titanate single phase perovskite ceramics with general formula Ba1-xDy2x/3Zr0.25Ti0.75O3 prepared by solid-state reaction method. Temperature and frequency dependent dielectric studies of the ceramics reveal relaxor behavior. A non-Debye relaxation, which is analogous to the magnetic relaxation in spin-glass system, is observed clearly around temperature of dielectric permittivity maximum (Tm). Frequency dependence of Tm governed by production of polar nano-regions is analyzed using Debye relation, Vogel–Fulcher (V–F) relation and power law. A clear change in dynamic behavior is observed by power parameter which is related to growth of interactions between polar nano-regions with different composition. Various parameters like activation energy for relaxation, freezing temperature, relaxation frequency, etc., are determined after non-linear curve fitting. Temperature dependence of dielectric constant at temperatures much higher and lower than Tm is analyzed by two exponential functions, which gives an idea about the production of polar clusters at high temperature and distribution of freezing temperatures at lower temperature. Various other associated parameters are calculated by non-linear curve fitting and their significance has been explained.


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About this article

Glassy behavior study of dysprosium doped barium zirconium titanate relaxor ferroelectric

Show Author's information Tanmaya BADAPANDA( )
Department of Physics, CV Raman College of Engineering, Bhubaneswar, Odisha-752054, India

Abstract

We report the glassy behavior of dysprosium doped barium zirconium titanate single phase perovskite ceramics with general formula Ba1-xDy2x/3Zr0.25Ti0.75O3 prepared by solid-state reaction method. Temperature and frequency dependent dielectric studies of the ceramics reveal relaxor behavior. A non-Debye relaxation, which is analogous to the magnetic relaxation in spin-glass system, is observed clearly around temperature of dielectric permittivity maximum (Tm). Frequency dependence of Tm governed by production of polar nano-regions is analyzed using Debye relation, Vogel–Fulcher (V–F) relation and power law. A clear change in dynamic behavior is observed by power parameter which is related to growth of interactions between polar nano-regions with different composition. Various parameters like activation energy for relaxation, freezing temperature, relaxation frequency, etc., are determined after non-linear curve fitting. Temperature dependence of dielectric constant at temperatures much higher and lower than Tm is analyzed by two exponential functions, which gives an idea about the production of polar clusters at high temperature and distribution of freezing temperatures at lower temperature. Various other associated parameters are calculated by non-linear curve fitting and their significance has been explained.

Keywords: dielectric properties, diffuse phase transition, transition temperature, relaxors, polar nano-regions

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Publication history

Received: 08 August 2014
Accepted: 31 August 2014
Published: 30 November 2014
Issue date: December 2014

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© The author(s) 2014

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Open Access: This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited.

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