Synthesis of Mn1-x NixFe2O4 magnetic materials using natural iron sand prepared by co-precipitation method

Abstract

The magnetic nanoparticles, Mn1xNixFe204 (0.0 <0.50, on the other hand, the secondary phase of a-Fe203 obtained at x = 0.75. The lattice parameter is constant and crystallite size decreases when the x values increase. Whereas, the dislocation density and the lattice strain of the sample increase, respectively. Characterisation by SEM-EDS shows that the particle size of the sample is about 10.63 nm - 34.71 nm with the average diameter 21.26 nm and consists of Fe = 58,9 % wt; O = 35,0 % wt; Ni = 3,2 % wt and Mn = 2,9 % wt in the synthesized samples. The VSM result shows that the superparamagnetic hysteresis loop for each sample. Furthermore, the magnetic properties, such as coercivity, saturation, and remanence decrease with the increase of the x content. Studies of the structure and magnetic properties show that Mn05Ni0 5Fe2O4 tends to superparamaganetic nanoparticle behavior with smaller crystallite size 14.48 nm, lower coercivity field 111 Oe and high saturation magnetization 35.05 emu/g.