Magnetic properties of ultrafine particles and bulk material of cadmium ferrite

被引：43

作者：

Yokoyama, M

Ohta, E

Sato, T

机构：

[1] Keio Univ, Fac Sci & Technol, Dept Mat Sci, Kohoku Ku, Kanagawa 223, Japan

[2] Keio Univ, Fac Sci & Technol, Dept Appl Phys & Physicoinformat, Kohoku Ku, Kanagawa 223, Japan

[3] Tokyo Engn Univ, Fac Engn, Dept Elect, Tokyo 192, Japan

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 1998年 / 183卷 / 1-2期

关键词：

normal spinel ferrite; fine particle; spontaneous magnetization; magnetic anisotropy; cation distribution;

D O I：

10.1016/S0304-8853(97)01073-1

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We studied the magnetic properties of ultrafine cadmium ferrite particles that had been prepared by the coprecipitation method and bulk material by the generally used ceramic method. The ultrafine particles showed ferromagnetic behavior, while the bulk material had no spontaneous magnetization. We evaluated a large anisotropy constant K (3.6 x 10(6) erg/cm(3)) in the ultrafine cadmium ferrite particles. The enhanced magnetic nature of the ultrafine particles can be explained based on an idea of cluster formation which is relevant to cation distribution. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：173 / 180

页数：8

共 14 条

[1] CRITERION FOR FERROMAGNETISM FROM OBSERVATIONS OF MAGNETIC ISOTHERMS [J].