Preparation, electrical conductivity and magnetic susceptibility of Eu2Mn2/3Nb4/3O7

被引：11
|
作者：
Chen, G
Takenoshita, H
Kamegashira, N
机构：
[1] Department of Materials Science, Toyohashi University of Technology, Toyohashi, 441, Tempaku-cho
来源：
MATERIALS LETTERS | 1996年 / 27卷 / 06期
关键词：
complex oxides; electrical conductivity; magnetic susceptibility; Eu2Mn2/3Nb4/3O7;
D O I：
10.1016/0167-577X(96)00003-1
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A new complex oxide Eu2Mn2/3Nb4/3O7 with a pyrochlore-related structure has been prepared from Eu2O3, MnO and Nb2O5 at 1523 K in a reducing atmosphere. The X-ray diffraction patterns of this compound can be indexed by hexagonal symmetry with the lattice parameters a = 15.102(3) Angstrom, c=17.417(6) Angstrom. Electrical conductivity shows a semiconducting property. It is shown from the results of magnetic susceptibility that this compound has a paramagnetic property in the temperature range 77-600 K and that the valence numbers of Eu, Mn and Nb in Eu2Mn2/3Nb4/3O7 are 3(+), 2(+) and 5(+), respectively.
引用
收藏
页码：323 / 325
页数：3
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