SUBSTITUTION OF CO3 GROUPS FOR COPPER IN YBCO - THE OXYCARBONATES YNBA2NCU3N-1CO3O7N-3

被引：22

作者：

BOULLAY, P ^{[1
]}

DOMENGES, B ^{[1
]}

HERVIEU, M ^{[1
]}

RAVEAU, B ^{[1
]}

机构：

[1] UNIV CAEN,ISMRA,CRISMAT LAB,CNRS,URA 1318,BD MARECHAL JUIN,F-14050 CAEN,FRANCE

来源：

CHEMISTRY OF MATERIALS | 1993年 / 5卷 / 11期

关键词：

D O I：

10.1021/cm00035a016

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The substitution of carbonate groups for copper in the oxide YBa2Cu3O7 has been studied by HREM. Two new phases, members of the series YnBa2nCu3n-1CO3O7n-3 have been evidenced for n = 2 and 3, respectively. The corresponding superstructures ''2a123 X b123 x 2c123'' and ''3a123 x b123 x 2c123'' correspond to the ordered substitution of one row of CO3 groups for one row of CuO4 groups out of two and three, respectively. The existence of 90-degrees-oriented domains and of chemical twinning is also shown and the role of CO3 groups at the domain boundaries discussed.

引用

页码：1683 / 1686

页数：4

共 7 条

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