THE ELECTRICAL EFFECTS OF FERMI ENERGY CHANGES IN EUSR2CU2NBO8 AND RELATED PHASES

被引：7

作者：

BABU, TGN

GREAVES, C

机构：

[1] School of Chemistry, University of Birmingham, Birmingham

来源：

PHYSICA C | 1991年 / 185卷

关键词：

D O I：

10.1016/0921-4534(91)92095-S

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

EuSr2Cu2NbO8 and EuSr2Cu2TaO8, which adopt a structure related to YBa2Cu3O7-x but with octahedral Nb and Ta ions substitutiong for the 4-coordinate Cu(1) ions, contain Cu2+ ions, and are therefore semiconductors. Changes in preparative conditions have been found to have little influence on their electrical behaviour, but partial substitution of Fe and Ti for Nb in EuSr2Cu2NbO8 produces metallic behaviour at around 300K, and a decrease in resistivity by a factor of around 10(4) at 50K.

引用

页码：585 / 586

页数：2

共 4 条

[1] NB AND TA SUBSTITUTIONS IN YBA2CU3O7-X AND RELATED PHASES - STRUCTURAL CHARACTERIZATION OF LA1.1BA1.9CU2.1M0.9O8 (M=NB,TA) [J].