PREPARATION AND ELECTRICAL AND MAGNETIC-PROPERTIES OF SR2-XNAXCUO3 (0-LESS-THAN-OR-EQUAL-TO-X-LESS-THAN-OR-EQUAL-TO-1) SOLID-SOLUTIONS

被引：12

作者：

SHIN, YJ ^{[1
]}

MANOVA, ED ^{[1
]}

DANCE, JM ^{[1
]}

DORDOR, P ^{[1
]}

GRENIER, JC ^{[1
]}

MARQUESTAUT, E ^{[1
]}

DOUMERC, JP ^{[1
]}

POUCHARD, M ^{[1
]}

HAGENMULLER, P ^{[1
]}

机构：

[1] UNIV BORDEAUX 1,CNRS,CHIM SOLIDE LAB,351 COURS LIBERAT,F-33405 TALENCE,FRANCE

来源：

ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE | 1992年 / 616卷 / 10期

关键词：

MIXED-VALENCE COPPER(II; III); OXIDE; SOLID SOLUTIONS; SEMICONDUCTING BEHAVIOR; ELECTRONIC STRUCTURE;

D O I：

10.1002/zaac.19926161033

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Mixed-valence copper(II/III) oxide solid solutions Sr2-xNaxCuO3 (0 less-than-or-equal-to x less-than-or-equal-to 1) have been prepared by solid-state reactions in oxygen atmosphere. All solid solutions exhibit the structure of Sr2CuO3 (S.G. Immm). Electrical conductivity and thermoelectric power measurements show a semiconducting behavior in the whole composition range. The electronic structure of Sr2CuO3 is compared with that of La2CuO4 on the basis of an iono-covalent model. Interpretation of transport properties suggests the formation of small polarons. Magnetic susceptibility and EPR measurements show that the antiferromagnetic ordering of Sr2CuO3 tends to vanish as x increases, however magnetic interactions are still strong for a concentration of Cu2+ ions corresponding to x = 0.8.

引用

页码：201 / 207

页数：7

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