Effects of Mn substitution of Co and Fe in spinel CoFe2O4 thin films

被引：30

作者：

Kim, Kwang Joo ^{[1
]}

Kim, Hee Kyung ^{[1
]}

Park, Young Ran ^{[1
]}

Park, Jae Yun ^{[2
]}

机构：

[1] Konkuk Univ, Dept Phys, Seoul 143701, South Korea

[2] Univ Incheon, Dept Mat Sci & Engn, Inchon 402749, South Korea

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2006年 / 304卷 / 01期

关键词：

Spinel; Cobalt ferrite; Substitution; Magnetization; Mossbauer;

D O I：

10.1016/j.jmmm.2006.01.193

中图分类号：

T [工业技术];

学科分类号：

08 [工学];

摘要：

Effects of Mn substitution for Co and Fe on the structural and magnetic properties of inverse-spinel CoFe(2)O(4) have been investigated. Mn(x)Co(1-x)Fe(2)O(4) and Mn(y)CoFe(2-y)O(4) thin films were prepared by a sol-gel method. The observed increase of the lattice constant of Mn(x)Co(1-x)Fe(2)O(4) indicates that Mn(2+) ions substitute the octahedral Co(2+) sites. Conversion electron Mossbauer spectroscopy data indicate that a fraction of octahedral Co(2+) ions exchange sites with tetrahedral Fe(3+) ions through Mn doping. Vibrating-sample magnetometry data exhibit a large increase of saturation magnetization for both Mn(x)Co(1-x)Fe(2)O(4) and Mn(y)CoFe(2-y)O(4) films compared to that of the CoFe(2)O(4) film. Such enhancement of magnetization can be explained in terms of a breaking of ferrimagnetic order induced by the Co(2+) migration. (C) 2006 Elsevier B. V. All rights reserved.

引用

页码：E106 / E108

页数：3

共 3 条

[1]

Relations between magneto-optical properties and reactivity in cobalt-manganese ferrite thin films and powders [J].