Abstract
The barium hexaferrite magnetic materials Mn-doped BaZn1+x Mnx Fe12-2x O19 (x = 0.4, 0.8, 1.2, 1.6, and 2) were prepared using the ceramic method. The powder samples ferrite were subjected to XRD, FT-IR, and UV-Vis to investigate the nanoparticles' structural changes. UV–Vis spectroscopy is used to obtain the samples' absorption spectrum and calculate the band gap energy. X-ray diffraction patterns and FT-IR investigations confirmed the formation of a single-phase M-type hexagonal structure. The grain size was measured from Scherrer's equation, and it is found in the range of 43-56 nm, with increasing the concentration of Mn ions, which shows the enhancement in the degree of crystallinity and increase in the size of grain size. UV-vis spectroscopy was used to confirm the formation of the BaZn1+x Mnx Fe12-2x O19 nanoparticles. The transmission was found to increase slowly in the 200-290 nm wavelength and then decreased to 332 nm after that increase until the maximum for all samples was about 99% in 480-800 nm wavelengths. The highest transmission will be exclusively used for window layers in solar cells. The band gap energy increased gradually with a rise in Mn ions and a decrease in Zn ion concentration. The refractive index, dielectric constant, and optical dielectric constant decreased with an increase in Mn ions and a decrease in Zn ions concentration.
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