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Electrochemical and high pressure superoxygenation of YCuO2+x and LaCuO2+x delafossites

  • R.J. Cava (a1), W.F. Peck (a1), J.J. Krajewski (a1), S-W. Cheong (a1) and H.Y. Hwang (a1)
  • DOI: http://dx.doi.org/10.1557/JMR.1994.0314
  • Published online: 01 March 2011
Abstract

Electrochemical and high pressure oxygenation experiments are described which extend the range of intercalated oxygen content beyond that accessible in 1 atm O2 treatments for the triangular planar cuprate delafossites YCuO2+x and LaCuO2+x, with the intention of increasing the hole doping, and filling vacancies in the intercalated oxygen lattice to decrease electrical resistivities. Stabilization of the 2H polytype of YCuO2 through 1% Ca substitution for Y and oxidation conditions for obtaining the pure orthorhombic intercalated oxygen superlattice form of YCuO2.50 are also described. Temperature dependent resistivities for some of the superoxygenated compositions are reported; metallic behavior was not observed.

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1R. J. Cava , H. W. Zandbergen , A. P. Ramirez , H. Takagi , C. T. Chen , J. J. Krajewski , W. F. Peck Jr., J. V. Waszczak , G. Miegs , and L. F. Schneemeyer , J. Solid State Chem. 104, 437 (1993).

6A. Demorgues , F. Weill , J. C. Grenier , A. Wattiaux , and M. Pouchard , Physica C 192, 425 (1992).

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Journal of Materials Research
  • ISSN: 0884-2914
  • EISSN: 2044-5326
  • URL: /core/journals/journal-of-materials-research
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