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Effect of Tungsten (W) Substitution on the Physical Properties of Bi-(2223) Superconductors

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Abstract

The superconducting Bi1.6Pb0.4Sr2Ca2Cu3−x W x O10+y (x=0.00, 0.05, 0.10, 0.15) bulk samples were prepared by the solid-state reaction method. The effects of W substitution on the BSCCO system have been investigated by the electrical resistivity (ρ-T), scanning electron microscopy (SEM), X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX), magnetic hysteresis and critical current density measurements. It has been found that the Bi-(2212) low-T C phase is formed for all the substitution levels, together with the Bi-(2223) high-T C phase. The results obtained from the XRD data show that the Bi-(2223) phase gradually transforms into the Bi-(2212) phase with increasing W substituting for Cu. In addition, from the magnetization measurements at the temperatures below the zero resistance temperatures of the samples, we have observed that a decreasing in magnitude of |M| with the increasing measurement temperature and W concentration. Therefore, the decreasing of |M| related to superconducting volume seems to imply an existence of flux-pinning centers in our samples.

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Acknowledgements

This work is supported by Research Fund of Çukurova University, Adana, Turkey, under grant contracts no: FEF2011YL25.

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Authors and Affiliations

  1. Department of Physics, Faculty of Sciences and Letters, Çukurova University, 01330, Adana, Turkey

    Nihal Türk, Mustafa Akyol, Ahmet Ekicibil & Bekir Özçelik

  2. Faculty of Engineering, Hakkari University, 30000, Hakkari, Turkey

    Hakan Gündoğmuş

  3. Vocational School of Health, Inonu University, 44280, Malatya, Turkey

    Z. Deniz Yakıncı

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  1. Nihal Türk
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  2. Hakan Gündoğmuş
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  3. Mustafa Akyol
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  6. Bekir Özçelik
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Correspondence to Bekir Özçelik.

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Türk, N., Gündoğmuş, H., Akyol, M. et al. Effect of Tungsten (W) Substitution on the Physical Properties of Bi-(2223) Superconductors. J Supercond Nov Magn 27, 711–716 (2014). https://doi.org/10.1007/s10948-013-2351-9

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  • DOI: https://doi.org/10.1007/s10948-013-2351-9

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