Synthesis of Ca-substituted Y 1-x Ca x Ba 2 Cu 4 O 8 at ambient pressure using CuI

X. G. Zheng, M. Suzuki, C. Xu, Hisao Kuriyaki, K. Hirakawa

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18 Citations (Scopus)


Ca-substituted Y124 superconductors Y 1-x Ca x Ba 2 Cu 4 O 8 (x = 0.05, 0.1) were synthesized at ambient oxygen pressure by a solid-state reaction method which used CuI instead of the conventional CuO. Experimental results showed a promoting effect of copper iodide on the formation of the 124 phase at normal oxygen pressure. T c determined from the Meissner effect was 88 K for x = 0.05 and 90 K for x = 0.1. For the same Ca-substitution rates T c(zero-resistance) of 80.5 K and 82.0 K was obtained respectively.

Original languageEnglish
Pages (from-to)272-276
Number of pages5
JournalPhysica C: Superconductivity and its applications
Issue number3-4
Publication statusPublished - Nov 10 1996

All Science Journal Classification (ASJC) codes

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

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