Synthesis, magnetic saturation and thermal stability of Mn1-xZnxFe2O4 nanoparticles

Magnetic nanoparticles have some important industrial applications such as ferro fluids, magnetic drug delivery, high-density information storage and fundamental understanding of unusual properties of nanoparticles as compared to those of bulk samples [1]. Thus, there is an increasing interest for production of new magnetic nanoparticles because the wide applications of these materials. Since the spinel ferrites crystallize in a FCC lattice with eight formula units in the cubic unit cell, they can be distinguished as two basic types, normal and inverse spinels [2]. The composition of ferrospinels can be described by the general formula M2+[Fe3+Fe3+]O4, which has wide applications in both the technological and the catalytic fields [3-5]. The purpose of this work is to produce nanoparticles of Mn1-xZnxFe2O4 through a simple chemical method,which have suitable super magnetic properties. Two different methods X-ray diffraction (XRD) and transmission electron micrograph (TEM) were used to determine size of nanoparticles of products. Thermal stabilities of mentioned nanoparticles were investigated by Thermo Gravimetric Analysis (TGA) method. To study magnetic properties of Mn1-xZnxFe2O4, Alternative Gradient Force Magnetometer (AGFM) and Vibrating Sample Magnetometer (VSM) were also applied. Finally, the effect of different values of x-parameter on saturation magnetization will be discussed.