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

Published online by Cambridge University Press:  03 March 2011

R.J. Cava ,
W.F. Peck Jr. ,
J.J. Krajewski ,
S-W. Cheong  and
H.Y. Hwang
R.J. Cava
Affiliation:
AT&T Bell Laboratories, Murray Hill, New Jersey 07974-0636
W.F. Peck Jr.
Affiliation:
AT&T Bell Laboratories, Murray Hill, New Jersey 07974-0636
J.J. Krajewski
Affiliation:
AT&T Bell Laboratories, Murray Hill, New Jersey 07974-0636
S-W. Cheong
Affiliation:
AT&T Bell Laboratories, Murray Hill, New Jersey 07974-0636
H.Y. Hwang
Affiliation:
AT&T Bell Laboratories, Murray Hill, New Jersey 07974-0636
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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.

Type
Articles
Information
Journal of Materials Research , Volume 9 , Issue 2 , February 1994 , pp. 314 - 317
Copyright
Copyright © Materials Research Society 1994

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References

REFERENCES

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