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

页码：323 / 325

页数：3

共 12 条

[1] FLUORITE-RELATED PHASES LN3MO7,LN= RARE-EARTH, Y, OR SC, M = NB, SB, OR TA .1. CRYSTAL-CHEMISTRY [J].