LaCuO 25+x and YCuO 2.5+x delafossites: Materials with triangular Cu 2+δ planes

Robert Joseph Cava, H. W. Zandbergen, A. P. Ramirez, H. Takagi, C. T. Chen, J. J. Krajewski, W. F. Peck, J. V. Waszczak, G. Meigs, R. S. Roth, L. F. Schneemeyer

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132 Scopus citations

Abstract

The YCuO 2 and LaCuO 2 delafossites consist of alternating triangular planes of Ln 3+ octahedra and O-Cu 1+ -O sticks. Here it is shown that under a limited set of conditions they may be oxidized to form new delafossite-derived phases YCuO 2.5+x , 0 ≤ x ≤ 0.05, and LaCuO 25+x , 0.07 ≤ x ≤ 0.18. Electron microscopy and powder X-ray diffraction are employed to characterize the resulting structures. Temperature-dependent resistivities and magnetic susceptibilities are reported. Characterization by soft X-ray photoabsorbtion spectroscopy, which shows them to be electronically unlike cuprates such as La 2-x Sr x CuO 4 , is also reported.

Original languageEnglish (US)
Pages (from-to)437-452
Number of pages16
JournalJournal of Solid State Chemistry
Volume104
Issue number2
DOIs
StatePublished - Jan 1 1993
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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    Cava, R. J., Zandbergen, H. W., Ramirez, A. P., Takagi, H., Chen, C. T., Krajewski, J. J., Peck, W. F., Waszczak, J. V., Meigs, G., Roth, R. S., & Schneemeyer, L. F. (1993). LaCuO 25+x and YCuO 2.5+x delafossites: Materials with triangular Cu 2+δ planes. Journal of Solid State Chemistry, 104(2), 437-452. https://doi.org/10.1006/jssc.1993.1179