Impedance spectroscopy study of Na2SmV5O15 ceramics

P. S. DAS; P. K. CHAKRABORTY; Banarji BEHERA; N. K. MOHANTY; R. N. P. CHOUDHARY

doi:10.1007/s40145-014-0087-z

Journal of Advanced Ceramics 2014, 3(1): 1-6 https://doi.org/10.1007/s40145-014-0087-z

Research Article |

Open Access | Issue | Published: 05 March 2014

Impedance spectroscopy study of Na₂SmV₅O₁₅ ceramics

Show Author's Information Hide Author's Information P. S. DAS^{^a}, P. K. CHAKRABORTY^{^a}, Banarji BEHERA^{^b}, N. K. MOHANTY^{^b}, R. N. P. CHOUDHARY^{^c}(

)

^a Department of Physics, Midnapore College, Midnapore 721 101, India

^b School of Physics, Sambalpur University, Burla 768 019, Sambalpur, Odisha, India

^c Department of Physics, ITER, Siksha "O" Anusandhan University, Bhubaneswar 751 030, Odisha, India

Keywords:

solid-state reaction, microstructure, impedance, conductivity

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DAS PS, CHAKRABORTY PK, BEHERA B, et al. Impedance spectroscopy study of Na₂SmV₅O₁₅ ceramics. Journal of Advanced Ceramics, 2014, 3(1): 1-6. https://doi.org/10.1007/s40145-014-0087-z

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Abstract

The polycrystalline Na₂SmV₅O₁₅ (NSV), a new member of the tungsten bronze (TB) family, was prepared by a mixed-oxide technique. The room-temperature X-ray diffraction (XRD) confirmed the formation of single phase compound with orthorhombic crystal structure. The scanning electron microscopy (SEM) analysis indicated that the compound has homogeneous micrograph with a uniform distribution of small grains over the entire surface of the sample. The analysis of impedance spectra of NSV in a low-temperature range (-100 ℃ to 100 ℃) at different frequencies exhibited interesting electrical properties like the contribution of bulk effect in conduction process. The study of imaginary part of the impedance at different temperatures showed existence of relaxation peak with its shift towards higher frequency on increasing temperature. This suggested the presence of frequency and temperature dependent relaxation process in the material. The loss peak spectra were found to abide by Arrhenius law with small activation energy of 0.12 eV. The temperature dependence of AC and DC electrical conductivity ( $σ_{AC}$ and $σ_{DC}$ ) was also obtained.

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Impedance spectroscopy study of Na₂SmV₅O₁₅ ceramics

Show Author's information Hide Author's Information P. S. DAS^{^a}, P. K. CHAKRABORTY^{^a}, Banarji BEHERA^{^b}, N. K. MOHANTY^{^b}, R. N. P. CHOUDHARY^{^c}(

)

^a Department of Physics, Midnapore College, Midnapore 721 101, India

^b School of Physics, Sambalpur University, Burla 768 019, Sambalpur, Odisha, India

^c Department of Physics, ITER, Siksha "O" Anusandhan University, Bhubaneswar 751 030, Odisha, India

Abstract

Keywords: solid-state reaction, microstructure, impedance, conductivity

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Publication history

Received: 31 July 2013

Revised: 31 October 2013

Accepted: 10 November 2013

Published: 05 March 2014

Issue date: March 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.