Abstract
The purpose of this research is to examine Ba0.85La0.15Fe12-2x(CoTi)xO19/CuO composites’ microwave absorption performance in the investigated frequency range of 18 GHz to 26.5 GHz (K-Band). By employing a mechanical blending technique, we have successfully synthesized composites of doped barium ferrite and Copper Oxide. Characterization of the prepared composites was done by XRD, TEM, FTIR, VSM, UV–vis NIR spectroscopy, and VNA. The incorporation of the CoTi barium hexaferrite nanoparticles into the CuO matrix is successfully demonstrated by the XRD spectra of the composite Co-Ti-BaM/CuO. Synthesized CT10 (2.71 eV) has a larger band gap than composites CT15 (2.6 eV) and CT20 (2.57 eV). The multi magnetic domain character of all the prepared composite material is indicated by their squareness ratio, which is roughly 0.3. The hysteresis loop of Co-Ti-BaM/CuO reveals the increase in saturation magnetization (Ms) and coercivity (Hc) on increasing Co-Ti concentration in composites. The complex permittivity and permeability were investigated in the K-band using vector network analyzer (VNA) and single layer reflection loss spectra with respect to 18 GHz to 26.5 GHz frequency range was studied using back metal plate transmission method. The minimum reflection loss (RL) for the compositions of CT10, CT15, and CT20 was found to be –22.7 dB, −21.83 dB, and −19.7 dB, respectively. Synthesized composites CT10 and CT20 resulted in broad band absorption bandwidth of more than 90 % of value 6.2 GHz and 6.32 GHz, respectively. This research could be used as EMI shielding design strategies for 5G technology and other advanced wireless applications.
Published Version
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