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Journal of Materials Science

, Volume 34, Issue 19, pp 4705–4710 | Cite as

Effect of orientation of c-axis on Ba4CuPt2O9 compounds of fluorine-doped YBa2Cu3Ox superconductors

  • T. Hamada
  • R. Morimo
  • K. Kumamoto
  • M. Ibusuki
  • K. Nagata
  • A. Takada
Article
  • 36 Downloads

Abstract

An experimental study has been carried out to investigate a synergistic effect of Ba4CuPt2O9 compounds on the critical current density to fluorine-doped YBCO superconductors. The Ba4CuPt2O9 compounds were synthesized by a solid state reaction. It was found that the synthesis temperature of the Ba4CuPt2O9 compounds was over 800 °C, which was higher than that of a paper ever reported. In addition, the influence of the Ba4CuPt2O9 compounds on the critical current density to the YBCO superconductors has been investigated to use two types of Ba4CuPt2O9 compound. One is not heat-treated, i.e., source materials, and the other is heat-treated at 950 °C. It was found that the former affected the orientation of c-axes, but the latter did not have an influence on the orientation to the c-axes, and molested the superconductivity to the samples quenched at temperatures above 850 °C.

Keywords

Polymer Experimental Study Solid State Synergistic Effect Solid State Reaction 
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.
    Teruo matsushita, Materials Science Forum 137–139 (1993) 677.Google Scholar
  2. 2.
    M. Murakami, M. Morita and K. Miyamoto, " Prog. High Temperature Superconductivity," Vol. 15 (World Scientific, Singapore, 1989) p. 95.Google Scholar
  3. 3.
    B. Ni, M. Kobayashi, K. Funaki, K. Yamafuji and T. Matsushita, Jpn. J. Appl. Phys. 30 (1991) L1861.Google Scholar
  4. 4.
    H. Fujimoto, M. Murakami, S. Gotoh, N. Koshizuka, T. Oyama, Y. Shiohara and S. Tanaka, "Adv. Superconductivity II" (Springer-Verlag, Tokyo, 1990) p. 285.Google Scholar
  5. 5.
    M. Murakami, H. Fujimoto, S. Gotoh, K. Yamaguchi, N. Koshizuka and S. Tanaka, Physica C 185 (1991) 321.Google Scholar
  6. 6.
    Chan-joong kim, Ki-baik kim, Il-hyun kuk and Gye-won hong, Physica C 281 (1997) 244.Google Scholar
  7. 7.
    N. Ogawa, I. Hirabayashi and S. Tanaka, Physica C 177 (1991) 101.Google Scholar
  8. 8.
    M. Yoshida, N. Ogawa, I. Hirabayashi and S. Tanaka, Physica C 185–189 (1991) 2409.Google Scholar
  9. 9.
    T. Hamada, R. Morimo and R. Ogura, J. Mater. Sci. 31 (1996) 2579.Google Scholar
  10. 10.
    T. Hamada, Y. Ohzono, T. Akune and N. Sakamoto, J. Mater. Sci. 32 (1997) 3469.Google Scholar
  11. 11.
    S. R. Ovshinsky, R. T. Young, D. D. Demaggio, G. A. G and Vander leeden, Phys. Rev. Lett. 58 (1987) 2579.Google Scholar
  12. 12.
    T. Hamada and R. Morimo, Phys. Stat. Sol. (a) 151 (1995) 199.Google Scholar
  13. 13.
    Manabu furuta, Naoyuki ogawa and Izumi hirabayashi, Kotaibutsuri 26 (1991) 877.Google Scholar
  14. 14.
    JCPDS card J-139-18.Google Scholar

Copyright information

© Kluwer Academic Publishers 1999

Authors and Affiliations

  • T. Hamada
    • 1
  • R. Morimo
    • 1
  • K. Kumamoto
    • 1
  • M. Ibusuki
    • 1
  • K. Nagata
    • 1
  • A. Takada
    • 2
  1. 1.Department of Electrical EngineeringMiyakonojo College of TechnologyMiyakonojoJapan
  2. 2.Department of Electrical EngineeringHakodate College of TechnologyHakodateJapan

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