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Journal of Nanomaterials
Volume 2016, Article ID 9781790, 6 pages
http://dx.doi.org/10.1155/2016/9781790
Research Article

Zinc Nanoparticles at Intercrystallite Sites of (Cu0.5Tl0.5)Ba2Ca3Cu4O12−δ Superconductor

1Materials Research Laboratory, Department of Physics, Faculty of Basic and Applied Sciences (FBAS), International Islamic University (IIU), Islamabad 44000, Pakistan
2Materials Science Lab, Department of Physics, Quaid-i-Azam University, Islamabad 45320, Pakistan

Received 4 December 2015; Revised 16 February 2016; Accepted 18 February 2016

Academic Editor: Jim Low

Copyright © 2016 Irfan Qasim et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We synthesized /(Cu0.5Tl0.5)Ba2Ca3Cu4  /CuTl-1234 = 0~3 wt.% nanoparticles-superconductor composites by solid-state reaction technique and examined the effects of zinc (Zn) nanoparticles on structural and superconducting properties of CuTl-1234 phase. Unaltered crystal structure of host CuTl-1234 phase confirmed the existence of Zn nanoparticles at intercrystallite sites. We observed an improvement in grains size and intergrains connectivity by healing up the voids after incorporation of Zn nanoparticles in CuTl-1234 superconductor. Superconducting properties of /CuTl-1234 composites were suppressed for all Zn nanoparticles concentrations. Suppression of zero resistivity critical temperature and variation in normal state resistivity  (Ω-cm) were attributed to reduction of superconducting volume fractions and enhanced scattering cross section of mobile carriers.