期刊
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
卷 316, 期 2, 页码 170-173出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jmmm.2007.02.046
关键词
M-type hexaferrites; magnetic properties; permanent magnets; rare-earth substitution
The effect of Gd substitution in M-type strontium hexaferrites has been examined in two series of samples, (Sr1-xGdx)O center dot 5.25 Fe2O3 and Sr1-xGdxFe12-xCoxO19, both prepared by the ceramic method, where x = 0-0.40. The samples have been characterized by XRD, VSM and SEM-EDAX techniques. All substituted samples present primarily the hexaferrite structure. Sample (Sr0.95Gdx0.05)O center dot 5.25 Fe2O3 is single phase. Formation of impurity phases is affected by stoichiometry and presence of Co. In Sr-Gd samples, coercivity showed a maximum value of 305 kA/ m (3.8 kOe) for x = 0.20, while remanence and saturation magnetization did not decrease. Coercivity and magnetization in the Sr-Gd-Co series decreased steadily with substitution degree. (C) 2007 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