Microstructural and Microwave Electromagnetic Properties of FeCoB-SiO2 Film on PET Substrate

doi:10.3724/SP.J.1077.2010.01150

Abstract

Abstract: Microstructural and electromagnetic properties of FeCoB-SiO₂ films prepared on PET substrates by radio- frequency sputtering were investigated. The as-deposited FeCoB-SiO₂ films are found to be amorphous with an electrical resistivity of 1755.73 μΩ·cm and a saturation magnetization of 0.7 T. Because of the existence of nonmagnetic matrix resistance to magnetic wall displacement, those FeCoB-SiO₂ films have a substantially higher coercivity of 13130.205 A/m over that of traditional amorphous magnetic films. Complex permeability μ was measured by a microwave network analyzer using the coaxial transmission technique, and double resonance peaks in microwave magnetic permeability were observed in the frequency range of 3.8-5 GHz. This is beneficial for the films to be used as a micro absorber at large bandwidths, resulting in μ'>2.5 in the frequency range of 500 MHz-12 GHz and μ''>6 for 3.6-8 GHz. The experimental results demonstrate that the FeCoB-SiO2 films deposited on flexible substrates have good potential for high frequency applications.

Key words: microwave electromagnetic property, PET substrate, permeability

CLC Number:

TB33

ZHANG Li, ZHU Zi-Wei, KUANG Ren-Xiong, DENG Long-Jiang. Microstructural and Microwave Electromagnetic Properties of FeCoB-SiO₂ Film on PET Substrate[J]. Journal of Inorganic Materials, 2010, 25(11): 1150-1154.

References

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Microstructural and Microwave Electromagnetic Properties of FeCoB-SiO₂ Film on PET Substrate

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