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Dysprosium doped Tl-1212 superconductors with varying Pb content

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Abstract

Dy-doped Tl-1212 superconductors with varying Tl stoichiometry (TlxPb1-x)(Ba0.05Sr0.95)2(Ca0.8Dy0.2)Cu2Oz (x=0.2,0.4,0.5,0.6,0.8,1.0) were fabricated by a two-step procedure. Tl-free precursors were prepared by a wet chemical malic acid gel method, followed by thallination at temperatures between 880 and 920 °C. X-ray diffraction was employed to determine the phase-purity of the samples. The best critical temperatures were obtained for samples with x: 0.4, 0.5 and 0.6. Tc(0) values up to 100 K could be obtained for samples with the composition (Tl0.4Pb0.6)(Ba0.05Sr0.95)2(Ca0.8Dy0.2)Cu2Oz sintered at 915 °C. Lower Tl stoichiometry resulted in secondary phases, higher Tl stoichiometry led to a decrease in the superconducting properties.

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Authors and Affiliations

  1. Institute for Chemical Technology of Inorganic Materials, Johannes Kepler University, 4040, Linz, Austria

    H. Sudra, G. Gritzner & H. Puchinger

  2. Institute of Experimental Physics, Slovak Academy of Sciences, 04001, Košice, Slovak Republic

    V. Kavečansky

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  1. H. Sudra
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  2. G. Gritzner
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  3. H. Puchinger
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  4. V. Kavečansky
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Correspondence to G. Gritzner.

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74.7.Jt

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Sudra, H., Gritzner, G., Puchinger, H. et al. Dysprosium doped Tl-1212 superconductors with varying Pb content. Appl. Phys. A 84, 445–448 (2006). https://doi.org/10.1007/s00339-006-3634-9

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  • DOI: https://doi.org/10.1007/s00339-006-3634-9

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