期刊
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
卷 322, 期 14, 页码 1999-2005出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jmmm.2010.01.022
关键词
Ni-Zn ferrite; Oxalate precursor; Domain states; a.c. susceptibility; Hysteresis studies
资金
- UGC (University Grant Commission) New Delhi, India
Nickel zinc ferrites with generic formula, Ni(X)Zn(1-X)Fe(2)O(4) (with X = 0.28-0.40) were synthesized by an oxalate precursor route starting with acetates to study their magnetic properties. The saturation magnetization versus temperature curves resemble those of R type ferrites. The system shows the presence of Yafet-Kittel type of spin. It is observed that magnetic moment (n(B)) values increase with the addition of Ni(2+). The remanance ratio R tends to increase with the addition of Ni(2+), which has been attributed to the increase of magnetocrystalline an isotropy constant (K1). The values of R compare well with the theoretical value (0.87). The coercive force (H(c)) tends to increase with the addition of Ni(2+), which has been related to the reverse domain formation. Studies on temperature variation of R and H(c) reveal that these parameters are thermally insensitive, which confirms the presence of multidomain grains in the material. These observations have been supported by a. c. susceptibility studies. (C) 2010 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据