Superconductivity at 90 K in a multiphase oxide of Y-Ba-Cu

J. M. Tarascon, L. H. Greene, W. R. McKinnon, G. W. Hull

Research output: Contribution to journalArticlepeer-review


We have measured the resistance and dc susceptibility in a series of multiphase Y-M-Cu oxides, where M=Ca, Sr, and Ba. We find superconductivity in two of the Ba samples, of nominal composition Y2-xBaxCuO4-y with x=0.20 and x=0.25 For x=0.25, the midpoint of the resistive transition is 91 K, the resistance has reached zero by 83 K, and the Meissner signal reaches 2% of that expected for an ideal bulk superconductor at low temperatures.

Original languageEnglish (US)
Pages (from-to)7115-7118
Number of pages4
JournalPhysical Review B
Issue number13
StatePublished - 1987
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics


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