Oleic acid coated Mn-Zn-Sm ferrite nanoparticles for ferrofluid application

Abstract

The low temperature synthesized oleic acid coated samarium substituted Mn0.5Zn0.5SmxFe2-xO4 with increasing compositions extending up to the 0.3 Ferrite nanoparticles (NPs) for ferrofluid application. The structural, magnetic and compositional behaviors were studied via X-ray diffraction (XRD), transmission electron microscopy (TEM), field effect scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDS) and vibrating sample magnetometer (VSM) etc. The XRD pattern reveals that prepared ferrite NPs are crystalline in nature. It is observed that the crystallite dimensions are changes with the addition for substituent as Samarium (Sm). FESEM, HRTEM demonstrated the morphological nature. The little agglomeration was observed of rare – earth substituted Sm mixed cutting-edge Mn - Zn spinel NPs ferrite. All samples have a mesoporous structure and EDS gives the relative amount of each element at a microscopic level. The magnetic characterization done by VSM illustrated the superparamagnetic in nature by all prepared samples. The saturation magnetization (MS) decreases with increases in Sm substitution. The products showed the high selectivity of the samples towards ferrofluid application.