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Advances in Superconductivity XII pp 116–118Cite as

A New Family of 2223-Type Superconductors, (Tl1-x Hg x )2Sr2Ca2Cu3O y Synthesized Under High Pressure

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Abstract

We have synthesized new Ba-free Tl-based superconductor (Tl1-x Hg x )2Sr2Ca2Cu3Oy using high-pressure high-temperature technique. These compounds are chemically and structurally stabilized by partial substitution of Hg for T1. While Hg-free compound is multi-phased, Hg-doped compounds (x = 0.35–0.65) were nearly single phased and found to be superconducting with T c ’s of 80–103 K. Electron diffraction and transimission electron microscope observations have revealed a body centered tetragonal unit cell isostructural with Ba-containing Tl-2223 phase with the Ba-sites occupied by Sr. From structural refinements of the XRD data for x = 0.35, it was found that Sr and Cu sites are fully occupied, Whereas the Tl-site and the Ca-site are partially occupied by Cu and Tl, respectively. Reducing treatments in Ar/H2 atmosphere were found to be effective in enhancing T c up to 116 K for x = 0.35.

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Authors and Affiliations

  1. SRL/ISTEC, 10-13 Shinonome, 1-Chome, Koto-ku, Tokyo, 135-0062, Japan

    E. Kandyel, X.-J. Wu, S. Adachi & S. Tajima

Authors
  1. E. Kandyel
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  2. X.-J. Wu
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  3. S. Adachi
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  4. S. Tajima
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Editors and Affiliations

  1. New Industry Creation Hatchery Center, Research Institute of Electrical Communication, Tohoku University, 2-1-1 Katahira, 980-8577, Aoba-ku, Sendai, Japan

    Tsutomu Yamashita (Professor) (Professor)

  2. Superconductivity Research Laboratory, ISTEC, 1-10-13 Shinonome, 135-0062, Koto-ku, Tokyo, Japan

    Kei-ichi Tanabe (Director, Division 6) (Director, Division 6)

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© 2000 Springer Japan

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Kandyel, E., Wu, XJ., Adachi, S., Tajima, S. (2000). A New Family of 2223-Type Superconductors, (Tl1-x Hg x )2Sr2Ca2Cu3O y Synthesized Under High Pressure. In: Yamashita, T., Tanabe, Ki. (eds) Advances in Superconductivity XII. Springer, Tokyo. https://doi.org/10.1007/978-4-431-66877-0_26

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  • DOI: https://doi.org/10.1007/978-4-431-66877-0_26

  • Publisher Name: Springer, Tokyo

  • Print ISBN: 978-4-431-70270-2

  • Online ISBN: 978-4-431-66877-0

  • eBook Packages: Springer Book Archive

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