Electromagnetic Properties of Composites CoFeNiBSiMo, CoFeBSiCr and CoMnSiB in wide frequency bande

7th Maghreb Days of Material Sciences

Elboubakraoui, My C.^1 ; Bri, S.^2 ; Foshi, J.^1

Electronique, Instrumentation et de Mesure Physique: EIMPFSTE, Moulay Ismail University, Meknès, Morocco^1

Matériaux et Instrumentations: MIN, ESTM, Moulay Ismail University, Meknès, Morocco^2

关键词: Complex permittivity;    Electromagnetic properties;    External magnetic field;    Ferromagnetic wires;    Frequency ranges;    Frequency regions;    Negative real permittivity;    Scattering spectra;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/186/1/012012/pdf
DOI  :  10.1088/1757-899X/186/1/012012

来源: IOP

【 摘 要 】

In this paper, our study is based on composites with ferromagnetic wire with a frequency region in the microwave regime with scattering spectra strongly dependent on an external magnetic field and the microwire periodicity. Three types of composites made of grids of continuous and short-cut wires CoFeNiBSiMo, CoFeBSiCr and CoMnSiB are considered to employ different types of spectra of the permittivity and permeability in the frequency band 1 GHz-12 GHz. The complex permittivity increases remarkably with the increase of microwire periodicity, with negative real permittivity is observed over frequency range for wires. With this increase in the microwire periodicity, first we note decreased minimum reflection loss and maximum absorption.