Synthesis and characterization of Mn_xMg_1-xFe₂O₄ based on natural iron sand prepared by Co-precipitation method

Magnetic nano particles, Mn_xMg_1-xFe₂O₄ (x = 0.25, 0.5 and 0.75) with natural iron sand as raw material were successfully synthesized by co-precipitation method. The obtained samples were characterized by the x-ray diffractometer (XRD) and the vibrating sample magnetometer (VSM). The XRD result showed that the magnetic nano particles have a single phase of inverse-spinel face cubic center (fcc) structure. Furthermore, the lattice parameter constant, crystallite sizes and unit cell volume decrease with the increase of the x content. Contrary the dislocation density and lattice strain increase with increasing the x content. The VSM result showed that the saturated magnetization magnitude were getting high and the coercive field became low when the x were increased.