Exchange-coupled soft magnetic FeNi-SiO2 nanocomposite

被引：48
|
作者：
Zhao, YW
Ni, CY
Kruczynski, D
Zhang, XK
Xiao, JQ [1 ]
机构：
[1] Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USA
[2] Univ Delaware, Dept Mat Sci & Engn, W M Keck Electron Microscope Facil, Newark, DE 19716 USA
[3] UTRON Inc, Manassas, VA 20109 USA
来源：
JOURNAL OF PHYSICAL CHEMISTRY B | 2004年 / 108卷 / 12期
关键词：
D O I：
10.1021/jp037588r
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
We report a method to make exchange-coupled soft magnetic FeNi-SiO2 nanocomposite material composed of FeNi nanoparticles coated with a thin SiO2 layer. Permeability is independent of frequency up to at least 100 MHz, with value as high as 16 in samples with density merely 93% of the ideal density. The quality factors are higher than conventional high-frequency CoNi ferrites after 10 MHz and decrease in a much slower fashion with increasing frequency. We ascribe these experimental observations to the exchange coupling among the magnetic particles.
引用
收藏
页码：3691 / 3693
页数：3
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