Insights into the dielectric loss mechanism of bianisotropic FeSi/SiC composite materials
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2020
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High magnitudes of permittivity with the permeability
of the materials help to absorb electromagnetic waves more
efficiently. Snoek’s limit directly puts a constraint on the
enhancement of the permeability of the material. However, the
incorporation of the lossy material may help to enhance the
permittivity abruptly. In this study, we prepared a FeSi/SiC
composite material with the mechanical ball milling method and
investigated its enhancement of the dielectric behavior. The
bianisotropic nature was observed along with the phase purity in
the morphological studies. The Cole−Cole relaxation mechanisms
were observed to validate a complex relaxation mechanism with
104 times higher dielectric loss in the composite material. The
detection of the Warburg capacitance using the impedance
technique sheds new light on the ion diffusion mechanism in the metallic composite materials.
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BANERJEE, Prasun; KUMAR, Nagasamudram Suresh; FRANCO JR., Adolfo; SWAIN, Akshaya Kumar; NAIDU, Kadiyala Chandra Babu. Insights into the dielectric loss mechanism of bianisotropic FeSi/SiC composite materials. ACS Omega, Washington, v. 5, n. 40, p. 25968–25972, 2020. DOI: 10.1021/acsomega.0c03409. Disponível em: https://pubs.acs.org/doi/10.1021/acsomega.0c03409. Acesso em: 5 abr. 2023.