Cu-O vibrations of Ba2YCu3Ox

Michael Stavola, D. M. Krol, W. Weber, S. A. Sunshine, A. Jayaraman, G. A. Kourouklis, R. J. Cava, E. A. Rietman

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170 Scopus citations

Abstract

We present Raman and infrared absorption data for Ba2YCu3Ox with 7>x>6 for several samples with well-characterized oxygen content. Over this range the material has an oxygen-deficient tripled perovskite structure whose superconductivity properties depend critically on x. An orthorhombic-to-tetragonal transition occurs for x 6.5. We have examined both phases for the frequency range >400 cm-1 which contains the Cu-O bond-stretching vibrations. A force-constant model has been developed which allows us to assign the features in the spectra. Our results are consistent with the linear Cu-O-Cu-O chains in Ba2YCu3O7 being absent in the nonsuperconducting Ba2YCu3O6.

Original languageEnglish (US)
Pages (from-to)850-853
Number of pages4
JournalPhysical Review B
Volume36
Issue number1
DOIs
StatePublished - Jan 1 1987
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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