Structural and Magnetic Impressions of Rare Earth Tb Doping on Ba–In Based Hexaferrites Prepared Through Sol–Gel Route for Magnetic Aspects

This research looked at the effects of changing the doping level (x) on the characteristics of Ba_0.8In_0.2Fe_12-xTb_xO₁₉ (x = 0.0 ≤ x ≤ 0.20) hexaferrites prepared using the sol–gel auto combustion procedure. X-ray diffraction analysis of the microstructure revealed that lattice parameters increased as the doping level (x) raised, while porosity and dislocations decreased. Williamson Hall plots showed that micro strains among particles decreased, and average grain size showed a negligible change, as shown by morphological analysis. As the doping level (x) raised, the saturation magnetization and remanence ratio decreased before increasing at higher temperatures above x = 0.15. Coercivity and magnetocrystalline anisotropy, on the other hand, both rose before decreasing. At x = 0.15, the saturation magnetization was 55.778 emu/g, the coercivity was 5.997 kOe, the anisotropic field was 1.87 kOe, and the average magnetic moment was 10.5 µ_B. The unique characteristics demonstrated by the synthesized material indicate its promise for the advancement of high-performance magnetic materials for use in a large range of applications, including recording media, magnetic filters, and other magnetic devices.