Stabilization of the 8-8-20 structure-type in La8-xCaxCu8-yNiyO20

G. L. Roberts, Robert Joseph Cava, S. A. Carter, J. J. Krajewski, W. F. Peck

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5 Scopus citations

Abstract

The 8-8-20 oxygen deficient perovskite occurs in the La-Sr-Cu-O chemical system near composition La6.4Sr1.6Cu8O20. Here we show that this structure can be stabilized in the La-Ca-Cu-Ni-O system based on the composition La6.4Ca1.6Cu6Ni2O20. In the new system, a wider variation of hole concentration is possible. Transport properties of the series reveal an insulator to metal transition as a function of increasing Ca (hole) concentration. Phase stability studies suggest that Ni preferentially substitutes for octahedrally coordinated copper.

Original languageEnglish (US)
Pages (from-to)319-323
Number of pages5
JournalJournal of Solid State Chemistry
Volume121
Issue number2
DOIs
StatePublished - Feb 1 1996
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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