Copper Cobalt Magnetic Ceramic Materials Characterization at Terahertz Frequencies

This study presents the complex index of refraction and the complex permittivity of a magnetic ceramic material made of copper, cobalt, and iron oxides. The index of refraction and the extinction coefficient of the CuCo-ferrite exhibit an almost frequency independent behavior and were averaged to n...

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Published inJournal of aerospace technology and management Vol. 9; no. 2; pp. 241 - 248
Main Authors Boss, Alan Fernando Ney, Migliano, Antonio Carlos da Cunha, Wilke, Ingrid
Format Journal Article
LanguageEnglish
Portuguese
Published Departamento de Ciência e Tecnologia Aeroespacial 01.04.2017
Instituto de Aeronáutica e Espaço (IAE)
Subjects
ENGINEERING, AEROSPACE
ferrites
permittivity
refractivity
terahertz
transmission
Ferrites
Terahertz
Permittivity
Refractivity
Transmission
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Summary:This study presents the complex index of refraction and the complex permittivity of a magnetic ceramic material made of copper, cobalt, and iron oxides. The index of refraction and the extinction coefficient of the CuCo-ferrite exhibit an almost frequency independent behavior and were averaged to n = 3.62 ± 0.05 and k = 0.06 ± 0.02, respectively, over the frequency range from 0.2 to 1 THz. The corresponding complex permittivity was ε' = 13.12 ± 0.35 for the real part and ε'' = 0.46 ± 0.15 for the imaginary one. The absorption coefficient and the transmittance of the CuCo-ferrite were also determined. The absorption coefficient exhibits a dip at ~0.35 THz, which corresponds to a peak in transmittance at this frequency. The impact of the observations on the potential realization of novel THz electronic devices is discussed.
ISSN:2175-9146
2175-9146
DOI:10.5028/jatm.v9i2.739