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Stabilization of High-Tc Phase in Sputtered BiPbSrCaCuO Films by Post Anneal

  • H. Yamamoto
  • M. Katoh
  • M. Tanaka
  • Y. Aoki
  • K. Maeda
  • T. Shiono
Part of the An International Cryogenic Materials Conference Publication book series (ACRE, volume 36)

Abstract

The post anneal was investigated for amorphous (Bi,Pb)2Sr2Ca2Cu3Ox films deposited on (100) planes of MgO at about 400°C. The films were annealed in a closed Pt crucible together with a sintered bulk including Pb to supply enough constituent metal atoms in vapor. Also the film surface was covered by a MgO plate to suppress a change of the film composition during anneal. The film which contained the high-Tc phase above 70 % was obtained and the maximum Tc of zero resistance attained up 105 K. The results obtained revealed that the addition of Pb and/or the reduced pressure of oxygen were effective to promote the growth of the high-Tc phase under the conditions ensuring the stoichiometry during anneal.

Keywords

Film Composition Annealed Film Post Anneal Specimen Film Metallic Vapor 
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Copyright information

© Plenum Press, New York 1990

Authors and Affiliations

  • H. Yamamoto
    • 1
  • M. Katoh
    • 1
  • M. Tanaka
    • 1
  • Y. Aoki
    • 2
  • K. Maeda
    • 2
  • T. Shiono
    • 2
  1. 1.College of Sci. & Technol.Nihon UniversityFunabashi-shi, ChibaJapan
  2. 2.Showa Electric Wire and Cable Co. Ltd.Kawasaki-ku, KawasakiJapan

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