Fine-grained spinel ferrites: From the reactivity to magnetic properties

被引：21

作者：

Gillot, B ^{[1
]}

机构：

[1] Univ Bourgogne, Lab Rech React Solides, F-21011 Dijon, France

来源：

EUROPEAN PHYSICAL JOURNAL-APPLIED PHYSICS | 1998年 / 4卷 / 03期

关键词：

D O I：

10.1051/epjap:1998267

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The oxidation at low temperature of fine-grained ferrites containing oxidizable cations such as Cu+, Fe2+, Mn2+, Mo3+, V3+, has led to new mixed-valent cation deficient ferrites with a large number of vacancies. It has been demonstrated by DTG analysis that each cation oxidizes at a specific temperature in close relation with the cation-oxygen distance. The kinetics oxidation of each oxidizable cation has been explained on the basis of a diffusion-induced stress effect when these stresses are generated by the chemical gradient induced during the oxidation process. When fine-grained ferrites contain some Co-cations, it has been revealed that the stresses have a significant influence on the enhancement of the coercivity.

引用

页码：243 / 250

页数：8

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