Effect of La³⁺and Ti⁴⁺Ions on the Magnetic Properties of Barium Hexaferrite Powders Synthesized Using Sol-Gel Method

Doped and undoped barium hexaferrite powders ($BaFe₁₂O₁₉$, $Ba_0.7Ti_0.3Fe₁₂O₁₉$ and $Ba_0.7La_0.3Fe₁₂O₁₉$) were produced by the sol-gel method. The effects of substituting elements were studied in terms of the magnetic properties of barium hexaferrite powders. The magnetic properties were remarkably changed by the substitution of $La³⁺$ and $Ti⁴⁺$ ions for the $Ba²⁺$ ion and were accompanied by oxygen deficiency in the $BaFe₁₂O₁₉$. Coercivities ($H_C$) from 4200 to 5100 Oe, remanences ($M_R$) from 22 to 49 emu/g and saturation magnetizations ($M_S$) from 41 to 73 emu/g were obtained for different samples. The obtained results were discussed in detail.