Abstract

Zinc substituted nickel (Ni1-xZnxFe2O4 with x=0.00, 0.2 and 0.4) ferrite nanoparticles were synthesized by sol-gel auto combustion method using citric acid as a fuel. The metal nitrate to fuel ratio was taken as 1:3. The as synthesized powder of Ni-Zn ferrite nanoparticles is annealed at 600˚C for 6h and prepared sample was used for characterization and investigations of structural and magnetic properties. The structural characterization of Ni-Zn ferrite nanoparticles were done by X-ray diffraction technique. The crystallite size obtained by Scherrer’s formula is in the order of 24-29 nm. The lattice constant determined from XRD data is in the reported range 8.329-8.378 Å. The magnetic properties were investigated at room temperature using pulse field hysteresis loop tracer technique. The magnetic behaviour of Ni-Zn spinel ferrite nanoparticles suggests that the zinc strongly influences the magnetic properties.

Keywords: Ni-Zn ferrite, Sol-gel auto-combustion, Nanoparticles, XRD, Magnetic properties