Oxygen diffusivity in melt-processed SmBCO and YBCO bulk-superconductors

T. Yamada, H. Ikuta, M. Yoshikawa, Y. Yanagi, Y. Itoh, Tetsuo Oka, U. Mizutani

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4 Citations (Scopus)

Abstract

We studied the diffusivity of oxygen in melt-processed Sm-Ba-Cu-O (SmBCO) and Y-Ba-Cu-O (YBCO) bulk-superconductors. The chemical diffusion coefficients of oxygen estimated from the experimental results show that the addition of silver suppresses the oxygen diffusivity in melt-processed bulk-superconductors. On the other hand, the diffusion coefficients of SmBCO/Ag and YBCO/Ag were almost identical. We discuss the effect of Ag addition on the oxygen diffusivity by examining the microstructure of the samples. It is also shown that annealing at a lower temperature than YBCO is necessary to extract the high potential of SmBCO.

Original languageEnglish
Pages (from-to)713-717
Number of pages5
JournalPhysica C: Superconductivity and its Applications
Volume378-381
Issue numberPART 1
DOIs
Publication statusPublished - 2002 Oct 1
Externally publishedYes

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Keywords

  • Effect of Ag addition
  • Melt-processed superconductor
  • Oxygen diffusivity
  • Sm-Ba-Cu-O
  • Y-Ba-Cu-O

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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