Publication

Abstract : The implementation of smart and logical design for absorbers, along with careful selection of components, has proven to be a successful strategy in creating efficient electromagnetic wave (EMW) absorbers. By utilizing novel nanocomposite materials that integrate various loss mechanisms, including enhanced magnetic and dielectric loss, multiple scattering and reflection, and polarization loss, the fabrication of a gradient bi-layer absorber holds great promise for superior EMW absorption. By employing chemical methods, a novel dielectric-magnetic compound comprising of Co2FeAl Heusler Alloy and MWCNTs@NiSe2 was produced. Subsequently, a gradient bi-layer absorber was developed using these components to optimize impedance matching and bolster low-frequency absorption. Abundant hetero-interfaces within this ternary bi-layer nanocomposite absorber give rise to Schottky junctions and heightened interfacial polarization between its layers, components, and matrix. Notably, the utilization of Co2FeAl Heusler Alloy nanoparticles has been shown to lead to the manifestation of magnetic loss phenomena due to their inherent magnetic properties. Through the strategic utilization of the unique layer structure, in conjunction with the incorporation of multiple loss mechanisms, the ternary bi-layer nanocomposite was able to achieve an impressive reflection loss value of -29 dB, despite having a mere 1.4 mm total thickness. Our study offers a fresh framework for creating innovative bilayer gradient absorbers suitable for low frequency applications.