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Enhanced Inter-grain Connectivity in Nano-particles Doped (Cu0.5Tl0.5)Ba2Ca2Cu3O10−δ Superconductors

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Abstract

Polycrystalline (Cu0.5Tl0.5)Ba2Ca2Cu3O10−δ superconductors show strong composition variations at the termination ends of the crystals which compromise over-all superconducting properties of the final compound. These composition variations are one of the root causes of void formation which produces a poor quality material. The better inter-grain coupling suppresses the Josephson losses required for higher transport critical current density (J c ). The lower losses across the inter-grain Josephson junctions are essential for wire and microelectronic applications. We have fixed such inadvertent composition variation in (Cu0.5Tl0.5)Ba2Ca2Cu3O10−δ superconductors by doping them with nano-particles of CuO, BaO and CaO2. Nano-particles doped (Cu0.5Tl0.5)Ba2Ca2Cu3O10−δ superconductors were synthesized at 860 °C and characterized using X-ray diffraction (XRD), resistivity (ρ), ac-susceptibility (χ), scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR) measurements. The magnitude of superconductivity is significantly enhanced with the doping of nano-particles. The samples with 15 wt. % addition of CuO nano-particles have even shown textured elongated crystalline with extremely low population of voids.

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Acknowledgements

Higher Education Commission of Pakistan (HEC) through project No. 20-1482/R&D/09-1472 and International Centre for Theoretical Physics (ICTP) through project number PRJ-27 is acknowledged for their financial supports.

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Authors and Affiliations

  1. Materials Science Laboratory, Department of Physics, Quaid-i-Azam University, 45320, Islamabad, Pakistan

    Nawazish A. Khan

  2. Nano Science & Catalysis Division, National Centre for Physics, Shadhara Valley Road, Quaid-i-Azam University Campus, 45320, Islamabad, Pakistan

    Abida Saleem & S. Tajammul Hussain

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  1. Nawazish A. Khan
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  2. Abida Saleem
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  3. S. Tajammul Hussain
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Correspondence to Nawazish A. Khan.

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Khan, N.A., Saleem, A. & Hussain, S.T. Enhanced Inter-grain Connectivity in Nano-particles Doped (Cu0.5Tl0.5)Ba2Ca2Cu3O10−δ Superconductors. J Supercond Nov Magn 25, 1725–1733 (2012). https://doi.org/10.1007/s10948-012-1512-6

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  • DOI: https://doi.org/10.1007/s10948-012-1512-6

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