The magnetic properties and electrical conduction mechanism of Co1-xMnxFe2O4 spinel

被引：33
作者：
Lee, DH
Kim, HS
Yo, CH
Ahn, K
Kim, KH [1 ]
机构：
[1] Yonsei Univ, Dept Chem, Seoul 120749, South Korea
[2] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany
来源：
MATERIALS CHEMISTRY AND PHYSICS | 1998年 / 57卷 / 02期
关键词：
disordered systems; electronic transport; X-ray diffraction; gamma-ray spectroscopy;
D O I：
10.1016/S0254-0584(98)00192-8
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Co1-xMnxFe2O4 spinels were synthesized at 1080 degrees C in air as bulk phases. The lattice parameters increase with the addition of Mn cation, which is closely related to the effective substitution of Mn2+ cation. From the measurements of the magnetic moment, it is shown that Mn contributes to the canted magnetic moment between tetrahedral (A) and octahedral (B) sites, except for the sample with x = 0.2. The n-type conduction was observed from Seebeck coefficient measurements: this is ascribed the formation of Co3+ + e(-) and Mn3+ + e(-) from Co2+ and Mn2+ cations on A and B sites. The electrical conductivities increase with Mn substitution. It is suggested that the possibility of charge transfer between 2+ and 3+ cation in A as well as B sites may contribute to electrical conductivity. (C) 1998 Elsevier Science S.A. All rights reserved.
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收藏
页码：169 / 172
页数：4
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