Effects of the grain boundary on the coercivity of barium ferrite BaFe12O19
Effects of the grain boundary on the coercivity of barium ferrite BaFe12O19
复制标题
DOI：
10.1016/j.jmmm.2004.07.033
复制
发表时间：
2005-01-01
影响因子：
2.7
通讯作者：
Hur, NH
中科院分区：
文献类型：
--
作者：
Dho, J;Lee, EK;Hur, NH
本文研究了BaFe_（12）O_（19）多晶和单晶样品的磁性和微结构特性，以阐明磁性与晶界钉扎效应之间的关系。随着烧结温度从1100 ℃升高到1300 ℃，多晶样品的晶粒尺寸逐渐增大，但矫顽力却从4kOe左右大幅度下降到几个Oe，而对于晶界较少的单晶样品，M（H）曲线显示出几乎可以忽略的矫顽力。单晶和多晶样品之间的磁化率的差异进行了讨论在晶粒边界处的磁化钉扎。(C)2004 Elsevier B.V.保留所有权利。
The magnetic and micro-structural properties of both polycrystalline and single-crystal samples of BaFe12O19 have been investigated to elucidate the relationship between the coercivity and the grain boundary pinning effect. With increasing the sintering temperature of the polycrystalline sample from 1100 to 1300 degreesC, the grain size gradually increases while the coercivity largely drops from about 4 kOe to a few Oe. The M(H) curve for single-crystal sample, which has little grain boundaries, shows almost negligible coercivity. The difference in the coercivity between the single-crystal and polycrystalline samples is discussed in terms of the pinning of magnetization at the grain boundaries. (C) 2004 Elsevier B.V. All rights reserved.