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New Tl-Ba-Ca-Cu-O (1234, 1245 and 2234) Superconductors with Very High Tc

  • H. Ihara
  • R. Sugise
  • T. Shimomura
  • M. Hirabayashi
  • N. Terada
  • M. Jo
  • K. Hayashi
  • M. Tokumoto
  • K. Murata
  • S. Ohashi
Conference paper

Abstract

New TlBa2Ca3Cu4O11 (1234), TlBa2Ca4Cu5O13 (1245) and Tl2Ba2Ca3Cu4O12 (2234) superconductors with Cu-O multilayers above four layers have been synthesized. These compounds have Tc values of 117, 122 and 115 K, respectively. The 1234 phase showed the highest Tc value in the TlBa2Can-1CunO2n+3 superconductor family. The Tc value of 2234 phase was lower than that of 2223 phase.

The single Tl-O layered compounds have a simple tetragonal phase of the space group of P4/mmm with the lattice constants of a = b = 3.85 Å and c = 19.1 Å for the 1234 phase and a = b = 3.85 Å and c = 22. 3 Å for the 1245 phase. The double Tl-O layered 2234 phase has a body-centered-tetragonal structure with the lattice constants of a = b = 3.85 Å and c = 42.0 Å. Electron diffraction patterns and lattice images from a high resolution TEM have confirmed that these compounds have an oxygen-deficient layered-perovskite structure. Their c-lattice constants follow the c-axis rule of linear relations of c = 6.3 +3.2 n Å (n = the multiplicity of CuO layers in aunit) in the single T1-0 layer compound family and c=2 (8.2 + 3.2 n) Å in the double T1-0 layer compound family.

Keywords

Lattice Constant Electron Diffraction Pattern Layer Compound Lattice Image Experimental Lattice Constant 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. [1]
    S. kondoh, Y. Ando, M. Onoda and M. Sato, Solid State Comm., 65 1329 (1988).ADSCrossRefGoogle Scholar
  2. [2]
    Z. Z. Sheng & A. M. Hermann, Nature 332, 55 (1988)ADSCrossRefGoogle Scholar
  3. R. M. Hazen, L. W. Finger, R. J. Angel, C. T. Prewitt, N. L. Ross, C. G. Hadidiacos, P. J. Heaney, D. R. Veblen, Z. Z. Sheng, A. Elali, A. M. Hermann, Phys. Rev. Letter. 60 1657 (1988).ADSCrossRefGoogle Scholar
  4. [3]
    H. Maeda, Y. Tanaka, M. Fukutomi, T. Asano, Jpn. J. Appl. Phys. 27 209 1988.ADSCrossRefGoogle Scholar
  5. [4]
    J. M. Wheatley, T. C. Hsu, P. W. Anderson, Nature 333 121 (1988).ADSCrossRefGoogle Scholar
  6. [5]
    H. Ihara, R. Sugise, M. Hirabayashi, N. Terada, M. Jo, A. Negishi, M. Tokumoto, Y. Kimura, T. Shimomura, Nature 334 510 (1988)ADSCrossRefGoogle Scholar
  7. H. Ihara, M. Hirabayashi, N. Terada, M. Jo, K. Hayasi, A. Negishi, M. Tokumoto, H. Oyanagi, R. Sugise, T. Shimomura and S. Ohasi, Proc. MRS Intern. Meeting on Advanced Materials (May 1988, Tokyo); IEEE Magn. MAG25 No.3 (1989).Google Scholar
  8. [6]
    M. A. Subramanian, J. C. Calabrese, C. C. Torardi, J. Gopalakrishnan, T. R. Askew, R. B. Flippen, K. J. Morryssey, U. Chowdhry, A. W. Leight, Nature 332 420 (1988).ADSCrossRefGoogle Scholar
  9. [7]
    H. Ihara, M. Hirabayashi, R. Sugise, N. Terada, M. Jo, K. Hayashi, M. Tokumoto, T. Shimomura and S. Ohashi, (in print Phys. Rev. B 38 No16 (1988)).Google Scholar
  10. [8]
    J. D. Jorgensen, M. A. Beno, D. G. Hinks, L. Soderholm, K. J. Volin, R. L. Hitterman, J. D. Grace, Ivan K. Schuller, C. U. Segre, K. Zhang, M. S. Kleefisch, Phys. Rev. B 36 3608 (1987).ADSCrossRefGoogle Scholar
  11. [9]
    M. Tokumoto, H. Ihara, T. Matsubara, M. Hirabayashi, N. Terada, H. Oyanagi, K. Murata, Y. Kimura, Jpn. J. Appl. Phys. 26 1565 (1987).ADSCrossRefGoogle Scholar

Copyright information

© Springer Japan 1989

Authors and Affiliations

  • H. Ihara
    • 1
  • R. Sugise
    • 2
  • T. Shimomura
    • 3
  • M. Hirabayashi
    • 1
  • N. Terada
    • 1
  • M. Jo
    • 1
  • K. Hayashi
    • 1
  • M. Tokumoto
    • 1
  • K. Murata
    • 1
  • S. Ohashi
    • 4
  1. 1.Electrotechnical LaboratoryUmezono, Tsukuba, 305Japan
  2. 2.Ube Industries Ltd.Ube, 755Japan
  3. 3.Unitika R & D CenterUji, 611Japan
  4. 4.R & D DivisionAsahi Glass Co., Ltd.Hazawa, Kanagawa-ku, Yokohama, 221Japan

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