Influence of reducing thermo-chemical treatment on magnetic properties of magnetite Fe3O4 (100) epitaxial films

被引：4
|
作者：
Zhou, Y [1 ]
McEvoy, C [1 ]
Shvets, IV [1 ]
机构：
[1] Trinity Coll Dublin, SFI Nanosci Lab, Dept Phys, Dublin 2, Ireland
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2005年 / 290卷
基金：
爱尔兰科学基金会;
关键词：
magnetization; magnetite; antiphase boundaries; annealing effect;
D O I：
10.1016/j.jmmm.2004.11.364
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of low temperature annealing in a reducing atmosphere on the magnetic properties of epitaxial magnetite (1 0 0) films grown on MgO (1 0 0) substrate was investigated. We found that the magnetization of the films increases and the coercivity decreases with treatment in CO at the partial pressure of 1.01 x 10(5) Pa at 250 ° C. The annealed films show a sharp Verwey transition. Marginal change in the stoichiometry of the films is not the reason for the magnetization enhancement. It is thought that the decrease of antiphase boundaries density and the oxygen vacancies produced at the antiphase boundaries are responsible for the observed results. © 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：1033 / 1036
页数：4
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