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Research Article | Open Access

Dielectric properties of (Zn)x/CuTl-1223 nanoparticle–superconductor composites

M. MUMTAZa( )Liaqat ALIaShoaib AZEEMaSaad ULLAHaG. HUSSAINaM. W. RABBANIaAbdul JABBARbK. NADEEMa
Materials Research Laboratory, Department of Physics, FBAS, International Islamic University (IIU), Islamabad 44000, Pakistan
Department of Physics, Ghazi University, Dera Ghazi Khan 32200, Pakistan
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Abstract

Zinc (Zn) nanoparticles and (Cu0.5Tl0.5)Ba2Ca2Cu3O10-δ (CuTl-1223) superconducting phase were prepared separately by sol–gel and solid-state reaction methods, respectively. Zn nanoparticles were added in CuTl-1223 superconducting matrix with different weight percentage during the final sintering process to obtain (Zn)x/CuTl-1223 (x = 0–4 wt%) nanoparticle–superconductor composites. The effect of Zn nanoparticles on structural, morphological, superconducting, and dielectric properties of CuTl-1223 phase was investigated. The addition of these Zn nanoparticles has not affected the crystal structure of host CuTl-1223 superconducting phase. Superconducting properties were enhanced after the addition of Zn nanoparticles up to certain optimum content (i.e., x = 1 wt%), which were due to improved inter-grain connectivity by healing up of micro-cracks and reduction of defects like oxygen deficiencies, etc. The activation energy (U) was increased after the addition of Zn nanoparticles in CuTl-1223 phase. The dielectric properties of these samples (i.e., dielectric constant, dielectric loss) were determined by experimentally measured capacitance (C) and conductance (G) as a function of frequency at room temperature. The addition of metallic Zn nanoparticles in CuTl-1223 matrix has overall suppressed the dielectric parameters of (Zn)x/CuTl-1223 nanoparticle– superconductor composites. The metallic Zn nanoparticles played a significant role in inter-grain couplings by filling the voids and pores.

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Journal of Advanced Ceramics
Pages 159-166
Cite this article:
MUMTAZ M, ALI L, AZEEM S, et al. Dielectric properties of (Zn)x/CuTl-1223 nanoparticle–superconductor composites. Journal of Advanced Ceramics, 2016, 5(2): 159-166. https://doi.org/10.1007/s40145-016-0185-1

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Received: 25 January 2016
Revised: 11 March 2016
Accepted: 16 March 2016
Published: 14 June 2016
© The author(s) 2016

Open Access The articles published in this journal are distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/ by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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