INFLUENCE OF THE PREPARATION METHOD AND DOPING ON THE MAGNETIC AND ELECTRICAL-PROPERTIES OF AGNIO2

被引：48

作者：

SHIN, YJ ^{[1
]}

DOUMERC, JP ^{[1
]}

DORDOR, P ^{[1
]}

DELMAS, C ^{[1
]}

POUCHARD, M ^{[1
]}

HAGENMULLER, P ^{[1
]}

机构：

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

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 1993年 / 107卷 / 02期

关键词：

D O I：

10.1006/jssc.1993.1352

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Electrical and magnetic properties of delafossite-type AgNiO2 prepared either from LiNiO2 or from NaNiO2 as the precursors have been compared. The difference of behavior is attributed to the well known deviation from stoichiometry of LiNiO2 and to the presence of some Ni atoms in the Li layers whereas such effects may be neglected in NaNiO2. Magnetic interactions are antiferromagnetic (J < 0 in AgNiO2, in contrast to LiNiO2 (J > 0). This result is ascribed to the evolution of the covalency of the Ni-O bonds. Transport properties are interpreted in the framework of a semimetal model. A comparative approach of the correlation between structure, chemical bond, and electronic delocalization in delafossite-, α-NaFeO2-, and perovskite-type nickel(III) oxides is proposed. © 1993 Academic Press, Inc.

引用

页码：303 / 313

页数：11

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