Synthesis Of Sm3+ Substituted Cobalt Ferrite Nanomaterial Using Facile Sol-Gel Technique And Studying Its Effect On Structural And Magnetic Properties Of Cofe2-X Smxo4

In this research paper Samarium-substituted cobalt ferrites CoFe2-x Smx O4 (with x= 0, 0.10, 0.20, 0.30) was synthesized using sol-gel method. The structural characterizations of all the prepared samples were done using XRD and FTIR. These studies confirmed the formation of single-phase spinel symmetry in all the compositions with Fd3m space group. The increase in the value of lattice parameter with increase in Sm3+ concentration was observed. The Williamson-Hall analysis is used for estimating the average crystallite size and lattice strain induced due to the substitution of Sm3+ at Fe3+ site. The crystallite size is observed to increase with the concentration of samarium. The surface morphology of samples was determined using SEM. For finding out magnetic parameters like magnetization (Ms), anisotropy field (B1), and magneto crystalline anisotropy (k1) we used the "Law of Approach to Saturation. Due to the incorporation of Sm3+ ions, saturation magnetization (Ms) decreased from 47.3 to 29.2 emu/g and retentivity decreased from 18.5 to 10.1 emu/g. Moreover, as the composition of Sm3+ ions increases, Coercivity (Hc) decreases noticeably from 1347 to 932 Gauss. Thus the substitution of samarium strongly influences the magnetic characteristics of cobalt ferrite nanomaterial, and this property can be tailored for its multifunctional applications.