Synthesis conditions and superconductivity of Pb0.7Cu0.3Sr2Y0.5Ca 0.5Cu2Oy

Masae Kikuchi, Minako Shida, Eriko Ohshima, Yuji Muraoka, Yasuhiko Syono

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2 Citations (Scopus)

Abstract

Pb0.7Cu0.3Sr2Y0.5Ca 0.5Cu2Oy was synthesized as a mother specimen in air and then annealed under two different experimental conditions, in an oxidizing and in a reducing condition. The mother specimen was a nonsuperconductor, but both annealed specimens, one quenched from high temperature and the other treated in high-pressure O2, were superconductors with Tc's of about 50 K and about 60 K, respectively. The low Cu-valence of the quenched specimen which showed superconductivity suggests a decrease in the Pb-valence, while the high Tc of the specimen treated in high-pressure O2 would be explained by high Cu-valence and Pb4+.

Original languageEnglish
Pages (from-to)204-207
Number of pages4
JournalPhysica C: Superconductivity and its applications
Volume263
Issue number1-4
DOIs
Publication statusPublished - May 1996
Externally publishedYes

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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