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Preparation of Tl2Ba2Ca1 − y CeyCu2O8 − x/2Fx Ce-and F-substituted superconductors

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Abstract

High-T c superconducting ceramics with the compositions Tl2Ba2CaCu2O8 − x/2 (0 ≤ x ≤ 0.3), Tl2Ba2(Ca1 − y Cey)Cu2Ox (0 ≤ y ≤ 0.2), and Tl2Ba2(Ca0.9Ce0.1)(Cu1.98Fe0.02)F0.2O8.01 are synthesized. Partial fluorine substitution for oxygen in Tl2Ba2CaCu2O8 − x/2 (0 ≤ x ≤ 0.1) alters the carrier density in the Cu-O planes of the material, raising its superconducting transition temperature from 106 to 110 K. Partial cerium substitution for calcium in Tl2Ba2(Ca1 − y Cey)Cu2Ox (0 ≤ y ≤ 0.2) reduces T c. The combined substitution in Tl2Ba2(Ca0.9Ce0.1)(Cu1.98Fe0.02)F0.2O8.01 has an insignificant effect on T c.

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Authors and Affiliations

  1. Institute of Solid-State and Semiconductor Physics, Belarussian Academy of Sciences, ul. Brovki 17, Minsk, 220072, Belarus

    A. I. Akimov, T. M. Tkachenko & S. A. Lebedev

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  1. A. I. Akimov
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  2. T. M. Tkachenko
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  3. S. A. Lebedev
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Original Russian Text © A.I. Akimov, T.M. Tkachenko, S.A. Lebedev, 2006, published in Neorganicheskie Materialy, 2006, Vol. 42, No. 3, pp. 378–382.

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Akimov, A.I., Tkachenko, T.M. & Lebedev, S.A. Preparation of Tl2Ba2Ca1 − y CeyCu2O8 − x/2Fx Ce-and F-substituted superconductors. Inorg Mater 42, 331–335 (2006). https://doi.org/10.1134/S0020168506030204

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  • DOI: https://doi.org/10.1134/S0020168506030204

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