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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 19    Special 3    December 2009

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Electromagnetic characteristics and microwave magnetism of
Fe46Co44B10/SiO2 nano-multilayers
DENG Lian-wen(邓联文)1,2, HUANG Bai-yun(黄伯云)1, LIU Wen-sheng(刘文胜)1,
ZHOU Ke-sheng(周克省)2, YANG Bing-chu(杨兵初)2

1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China;

2. School of Physics Science and Technology, Central South University, Changsha 410083, China)

Abstract:Fe46Co44B10/SiO2 nano-multilayers were synthesized by radio frequency magnetron sputtering. The thickness of individual layer was designed and controlled in nano-meter. The effect of thickness of ferromagnetic layer, insulative layer or the total number of layers on the intrinsic characteristics and microwave permeability were investigated respectively. The results show that, saturation magnetization changes obviously with different thicknesses of ferromagnetic layer or insulative layer, but coercivity changes little and remains small. When the thickness of ferromagnetic layer and insulative layer keeps 1.5 and 1.3 nm respectively and the number of the total layers increases from 10 to 90, coercivity reduces and resistivity of the films improves from 0.25 to 2.22 Ω∙m. The resonant frequency locates at the point higher than 2 GHz and the imaginary part of complex permeability at 2 GHz is larger than 150. These multilayer films can be applied in the field of micromagnetic devices or anti-interference of electromagnetic wave.

 

Key words: Fe46Co44B10/SiO2 nano-multilayers; magnetron sputtering; electromagnetic characteristics; complex permeability

ISSN 1672-7029
CN 43-1423/U

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