PREPARATION AND CHARACTERIZATION OF FULLY STOICHIOMETRIC SRCOO3 BY ELECTROCHEMICAL OXIDATION

被引：168

作者：

BEZDICKA, P

WATTIAUX, A

GRENIER, JC

POUCHARD, M

HAGENMULLER, P

机构：

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

[2] SAS, INST INORGAN CHEM, CS-84236 BRATISLAVA, CZECHOSLOVAKIA

来源：

ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE | 1993年 / 619卷 / 01期

关键词：

STRONTIUM COBALTIATE(IV); SRCOO3; PREPARATION; CRYSTAL STRUCTURE; PHYSICAL PROPERTIES;

D O I：

10.1002/zaac.19936190104

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A nearly stoichiometric SrCoO3 phase had been prepared up to now only using high oxygen pressure. A new method for preparing fully stoichiometric SrCoO3 has been proposed using electrochemical oxidation. Brownmillerite-type SrCoO2.50 is oxidized into a completely stoichiometric perovskite at a potential of 500 mV for 180 hours at room temperature in alkaline media (1 M KOH). The oxidized phase has a cubic unit cell (a = 383.5 pm). It is metallic and, at temperatures below T = 280 K, it shows ferromagnetic behavior. The magnetic moment at 0 K is 2.1 mu(B). The physical properties of SrCoO3.00 have been explained in terms of partial occupancy of a sigma*e(g)alpha band.

引用

页码：7 / 12

页数：6

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