Physical and chemical properties of (Y1-xCax)(Ba2-xLax)Cu3O7

J. P. Zhou, J. S. Zhou, J. B. Goodenoug, J. T. McDevitt

Research output: Contribution to journalArticle

Abstract

The metallic conductivity of both the CuO2 sheets and the CuOx chains of YBa2Cu3O7-δ has been established. We have used double doping in (Y1-xCax)(Ba2-xLax)Cu3O7-δ to destroy the integrity of the CuO1-δ chains while keeping constant the total oxidation state of the Cu-O array. A break-up of the chain segments allows us to establish the temperature dependence of the Seebeck coefficient, α(T), due to the CuO2 sheets and, by difference, that of the CuO1-δ chains in YBa2Cu3O7-δ. We also show that double doping enhances significantly the chemical stability of the superconductive phase. The origin of the chemical stability and of the behavior of α(T) is interpreted.

Original languageEnglish (US)
Pages (from-to)651-652
Number of pages2
JournalJournal of Superconductivity
Volume8
Issue number5
DOIs
StatePublished - Oct 1 1995

Keywords

  • High-T superconductor
  • chain conduction
  • chemical stability
  • thermopower

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Physics and Astronomy (miscellaneous)

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