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EFFECT OF IN SITU COOLING ON SUPERCONDUCTIVITY OF ARTIFICIALLY LAYERED BSCCO FILMS WITH 2223 STRUCTURE.

Author(s) : SATO J., IKEDA S., NAKAMURA K.

Type of article: Article

Summary

THIN BSCCO FILMS WITH THE 2223 STRUCTURE WERE DEPOSITED ONTO MAGNESIUM-OXIDE SUBSTRATE KEPT AT 938 K (665 DEG C). IT WAS FOUND THAT THE OXYGEN PARTIAL PRESSURE AND SUBSTRATE TEMPERATURE DURING COOLING AFFECT SIGNIFICANTLY THE DEVELOPMENT OF SUPERCONDUCTIVITY OF THE FILMS. WHEN THE FILMS WERE COOLED STEPWISE UNDER A CRITICAL OXYGEN PARTIAL PRESSURE AROUND 0.3 TORR, THE AS-DEPOSITED FILMS SHOWED EITHER SUPERCONDUCTIVITY OR NONSUPERCONDUCTIVITY BEHAVIOR. HIGH-RESOLUTION TRANSMISSION ELECTRON MICROSCOPE IMAGES OF THE FILMS SHOWED NO ESSENTIAL DIFFERENCE IN THE MODULATED STRUCTURE, SUGGESTING THAT THE EXCESS OXYGEN IN THE BISMUTH-OXYGEN DOUBLE LAYERS IS THE SAME AND NOT THE CAUSE OF THE DIFFERENT SUPERCONDUCTING BEHAVIOUR IN THE FILMS.

Details

  • Original title: EFFECT OF IN SITU COOLING ON SUPERCONDUCTIVITY OF ARTIFICIALLY LAYERED BSCCO FILMS WITH 2223 STRUCTURE.
  • Record ID : 1992-0980
  • Languages: English
  • Source: J. Supercond. - vol. 3 - n. 4
  • Publication date: 1990/12
  • Document available for consultation in the library of the IIR headquarters only.

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