Microstructural, Morphological, and Magnetic Features of the Triple Perovskite Oxide La₃Mn₂FeO₉

Triple perovskite La₃Mn₂FeO₉ powder was synthesized via the sol gel method. The microstructural, morphological and magnetic features of the prepared perovskite sample were examined by means of X‑ray diffraction (XRD), filed-emission scanning electron microscopy (FE-SEM), and vibrating sample magnetometry (VSM). The XRD pattern was refined using the MAUD software based on the Rietveld program. The results confirmed that the sample crystallized in a trigonal structure, with a crystallite size measuring approximately 257 ± 5 nm and a microstrain of about 0.16%. The FE-SEM image revealed spherical like-particles with an average grain size in the vicinity of 514 nm. The VSM curve revealed that the prepared La₃Mn₂FeO₉ powder exhibited a ferromagnetic behavior, and subsequent fitting using the law of approach to saturation revealed a saturation magnetization of 1.156438 ± 0.00384 emu/g.