Advertisement

Crystalline Structures and Superconducting Properties of Rapidly Quenched BiSrCaCu2Ox Ceramics

  • Tsuneyuki Kanai
  • Teruo Kumagai
  • Atsuko Soeta
  • Takaaki Suzuki
  • Katsuzou Aihara
  • Tomoichi Kamo
  • Shinpei Matsuda
Conference paper

Abstract

Phase changes and superconducting properties of rapidly quenched BiSrCaCu2Ox ceramics have been studied. The rapidly quenched sample consists of an amorphous state which begins to crystallize around 510°C. The crystal system was found to be tetragonal with a=5.39Å and c=24.5Å. By annealing above 7OO°C, a tetragonal system with a=5.41Å and c=30.8Å was produced. The former crystal was a semiconductor and the latter was a superconductor with Tc=75K. A superconducting phase with Tc=105K was observed in a sample annealed at 840°C. The superconducting volume ratio in the samples had a maximum at 803–840°C. The decrease of the volume ratio at the higher temperatures is considered to result from a decomposition of the superconducting phase (75K) into a nonsuperconducting phase.

Keywords

Differential Thermal Analysis Amorphous State Superconducting Phase Tetragonal System Temperature Dependence Resistance 
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.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. [1]
    J. G. Bednorz and K. A. Muller: Z. Phys. B64 (1986) 189.ADSCrossRefGoogle Scholar
  2. [2]
    S. Uchida, H. Takagi, S. Tanaka and K. Kitazawa: Jpn. J. Appl. Phys. 26 (1987) Ll.Google Scholar
  3. [3]
    M. K. Wu, J. R. Ashburn, C. J. Torng, P. H. Hor, R. L. Meng, L. Gao, Z. J. Haung, Y. Q. Wang and C. W. Chu: Phys. Rev. Lett. 58 (1987) 909.ADSCrossRefGoogle Scholar
  4. [4]
    H. Maeda, Y. Tanaka, M. Fukutomi and T. Asano: Jpn. J. Appl. Phys. 27 (1988) L209.ADSCrossRefGoogle Scholar
  5. [5]
    E. Takayama-Muromachi, Y. Uchida, A. Ono, F. Izumi, M. Onoda, Y. Matsui, K. Kosuda, S. Takekawa and K. Kato: Jpn. J. Appl. Phys. 27 (1988) L365.ADSCrossRefGoogle Scholar
  6. [6]
    T. Kajitani, K. Kusada, M. Kikuchi, N. Kobayashi, Y. Syono, T. B. Williams and M. Hirabayashi: Jpn. J. Appl. Phys. 27 (1987) L587.CrossRefGoogle Scholar
  7. [7]
    E. Takayama-Muromachi, Y. Uchida, Y. Matsui, M. Onoda and K. Kato: Jpn. J. Appl. Phys. 27 (1988) L556.ADSCrossRefGoogle Scholar
  8. [8]
    T. Komatsu, R. Sato, K. Imai, K. Matushita, T. Yamashita: Jpn. J. Appl. Phys. 27 (1988) L550.ADSCrossRefGoogle Scholar

Copyright information

© Springer Japan 1989

Authors and Affiliations

  • Tsuneyuki Kanai
    • 1
  • Teruo Kumagai
    • 1
  • Atsuko Soeta
    • 1
  • Takaaki Suzuki
    • 1
  • Katsuzou Aihara
    • 1
  • Tomoichi Kamo
    • 1
  • Shinpei Matsuda
    • 1
  1. 1.Hitachi Research LaboratoryHitachi Ltd.Hitachi, Ibaraki, 317Japan

Personalised recommendations