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

Author:

Cava R.J.,Peck W.F.,Krajewski J.J.,Cheong S-W.,Hwang H.Y.

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.

Publisher

Springer Science and Business Media LLC

Subject

Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science

Reference6 articles.

1. LaCuO25+x and YCuO2.5+x Delafossites: Materials with Triangular Cu2+δ Planes

2. Electron microscopy study of electrochemically prepared La2NiO4+δ (0.17≤δ≤0.26)

3. 4 Natali Sora I. , Huang Q. , Santoro A. , Cava R. J. , Krajewski J. J. , and Peck W. F. Jr. , unpublished.

4. 3 Mattheiss L. F. , unpublished.

5. 2 Ramirez A. P. , Walstedt R. E. , Cava R. J. , Krajewski J. J. , Peck W. F. Jr. , and Bell R. , unpublished.

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