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Effects of Additional Elements (M=In, Al, Ga) on Superconductivity of Bi-Sr-Ca-Cu-O System

  • K. Shibutani
  • T. Miyatake
  • R. Ogawa
Conference paper

Abstract

The effects of additional elements on the superconductivity of a Bi-Sr-Ca-Cu-O system were studied by measuring the magnetic susceptibility and x-ray diffraction patterns of such a system. By observation of x-ray diffractions, a solid solution region in the low-and high-Tc (critical temperature) Bi-M-Sr-Ca-Cu-O phases were found to exist for O≤x≤1 (M=In, Ga) and for 0<x<0.5 (M=Al) in a Bi4-xMxSr3Ca3Cu6Oy system (4-3-3-6 system). In a Bi1-xMxSrCaCu2Oy system (1-1-1-2 system), a solid solution region in the low-and high-Tc phases were found to exist for 0≤x<0.3 (M=In, Ga, Al). Indium was found to be effective in raising the amount of both low-and high-Tc superconductivity phases and the critical current density. Aluminum and Gallium showed small effects on the formation of a high-Tc phase. Further addition of these elements broke the superconductivity of the Bi-Sr-Ca-Cu-0 system. These results suggest that the crystal of high-or low-Tc Bi-Sr-Ca-Cu-O phase was stabilized by the controlled addition of these elements.

Keywords

Nominal Composition Critical Current Density Additional Element Super Conducting Oxide Superconductor 
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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Copyright information

© Springer Japan 1989

Authors and Affiliations

  • K. Shibutani
    • 1
  • T. Miyatake
    • 1
  • R. Ogawa
    • 1
  1. 1.Superconducting and Cryogenic Technology SectionKobe Steel, Ltd.Wakinohama-cho, Chuo-ku, Kobe, 651Japan

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