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Two-zone annealing of Tl0.5Pb0.5(Sr0.8Ba0.2)2Ca2Cu3Oy

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Abstract

Stable conditions have been identified for two-zone processing of the superconducting thallium cuprate Tl0.5Pb0.5(Sr0.8Ba0.2)2Ca2Cu3Oy. With P(O2) of 0.8 atm, P(Tl2O) of 4.4 × 10−3 atm, and a sample temperature of 920 °C, single-phase Tl0.5Pb0.5(Sr0.8Ba0.2)2Ca2Cu3Oy, is produced with a Tc of 115 K, complete diamagnetic shielding, and Meissner fraction greater than 70%. Although a small amount of melting occurs under these conditions, a comparison of the low-field diamagnetic shielding for these samples with samples of Pb- and Sr-free TlBa2Ca2Cu3Oy and Tl2Ba2Ca2Cu3Oy, suggests that such melting is not necessary to produce the triple-CuO2-layer superconductors.

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Authors and Affiliations

  1. Department 1153/MS 0345, Sandia National Laboratories, Albuquerque, New Mexico, 87185-0345, Mexico

    T. L. Aselage, E. L. Venturini, J. A. Voigt, D. L. Lamppa & S. B. Van Deusen

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  1. T. L. Aselage
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  2. E. L. Venturini
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  3. J. A. Voigt
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  4. D. L. Lamppa
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  5. S. B. Van Deusen
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Aselage, T.L., Venturini, E.L., Voigt, J.A. et al. Two-zone annealing of Tl0.5Pb0.5(Sr0.8Ba0.2)2Ca2Cu3Oy. Journal of Materials Research 9, 2470–2473 (1994). https://doi.org/10.1557/JMR.1994.2470

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  • DOI: https://doi.org/10.1557/JMR.1994.2470

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