Abstract
Modern fundamental science is fascinated by spinel ferrite's unique properties and potential applications. The sol-gel method was used to prepare the spinel ferrites. The synthesized samples have formula MgSmxFe2-xO4 (x = 0, 0.025, 0.05, 0.075, 0.10). The structural properties of all the samples were measured by X-ray diffraction analysis. All the samples have a cubic spinel structure, while few traces of the secondary phase were observed in the last two samples. The magnetic properties of all the samples were measured from + 2000 to - 2000 Oe. The narrow loops of all the samples proved their soft nature. The Curie temperature was decreased with the substitution of samarium ions. The saturation magnetization and remanence decreased with the substitution of samarium ions, while coercivity was enhanced. The magnetic moments have the same trend as magnetization, while the anisotropy constant was increased with the substitution of rare-earth ions. All these parameters suggested that these prepared samples may be suitable for high-density magnetic recording applications.