Structure and properties of substituted BaPbO3 and Ba2PbO4 compounds

被引：6
作者：
Kodenkandath, T [1 ]
机构：
[1] Univ London Imperial Coll Sci Technol & Med, Dept Mat, London SW7 2BP, England
来源：
MATERIALS CHEMISTRY AND PHYSICS | 2000年 / 62卷 / 01期
关键词：
Ba-Pb/M-O/F system; chemical substitutions; superconductivity;
D O I：
10.1016/S0254-0584(99)00163-7
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Structure-property relations have been studied in the following systems: (a) perovskite type BaPbl-xCuxO3 and Ba1-xLaxPbO3 and (b) K2NiF4 type Ba2Pb1-xMxO4 (M = Bi, Sb) and Ba2Pb1-xBixO4-yFy. In the case of BaPb1-xCuxO3, an orthorhombic to pseudo-cubic structural transition is observed at x = 0.3 and the samples remained metallic. A similar behaviour is observed also in Ba1-xLaxPbO3. In both systems, the metallic character of BaPbO3 was found to decrease with substitution. No evidence for superconductivity is observed in any of the compositions. However, a non-reproducible superconducting like transition has been noticed in a nominal, multiphasic Ba-2(Pb0.75Bi0.25)O3F composition at around 40 K. (C) 2000 Elsevier Science S.A. All rights reserved.
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页码：23 / 28
页数：6
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