Superconductivity and crystal structure of Pb(Ba,Sr)2(Ln,Ca)Cu3Oy and Pb(Ba,Sr)2(Ln,Ce)2Cu3Oy(Ln: lanthanoid) with (Pb,Cu) double layers

Ayako Tokiwa, Yasuhiko Syono, Takeo Oku, Masayasu Nagoshi

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Abstract

Pb(Ba,Sr)2(Ln,Ca)Cu3Oy (Pb2212, y=7.0-8.4) and Pb(Ba,Sr)2(Ln,Ce)2Cu3Oy (Pb2222, y=9.0-10.4) were synthesized, and crystal structure, phase transition and superconductivity were studied. The lanthanoid contraction was clearly observed in a relationship of 4f-electron number of Ln3+ versus cell volume of Pb2212, consistent with constant oxygen content for all of the lanthanoid substitutions. Transition temperature from oxygen rich phase to poor one was almost constant to be 580°C, in contrast to variation of the ortho-tetra transition temperature in Ba2LnCu3Oy.

Original languageEnglish
Pages (from-to)619-620
Number of pages2
JournalPhysica C: Superconductivity and its applications
Volume185-189
Issue numberPART 1
DOIs
Publication statusPublished - 1991 Dec 1

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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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