ELECTROCHEMICAL AND HIGH-PRESSURE SUPEROXYGENATION OF YCUO2+X AND LACUO2+X DELAFOSSITES

被引:38
作者
CAVA, RJ
PECK, WF
KRAJEWSKI, JJ
CHEONG, SW
HWANG, HY
机构
[1] AT & T Bell Laboratories, New Jersey 07974-0636, Murray Hill
关键词
D O I
10.1557/JMR.1994.0314
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Electrochemical and high pressure oxygenation experiments are described which extend the range of intercalated oxygen content beyond that accessible in 1 atm O-2 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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页码:314 / 317
页数:4
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