Structural and magnetic properties of nanometric Zn0.5Co0.5Fe2O4 prepared by hydrothermal method

The study of the structural, morphology and magnetic properties of Zn0.5Co0.5Fe2O4 ferrite is the objective of this work. The sample was prepared by hydrothermal method and was characterized by X-ray diffraction (XRD), (SEM) and (TEM) micrographs and magnetization measurements. The magnetic hysteresis loops, field cooling (FC) and zero field cooling (ZFC) curves, in temperature range (0-400K), were measured using XL-SQUID magnetometer and the values of blocking temperatures (T-B) were determined. The results indicated that Zn0.5Co0.5Fe2O4 sample were formed in a single spinel phase and gives the value for the lattice parameter (8.3952 angstrom) and nanosizes of particles (13.8 nm) were compared with these obtained from ZnFe2O4 sample prepared also by synthesis method (8.4261 angstrom and 14 nm). Although, the superparamagnetic behaviour for Co-Zn ferrite has observed at 350K with a blocking temperature (T-B = 300K), that is maximum at the value obtained in the case of Zn-ferrite (T-B = 12K).