Effect of Zinc doping on Structural and Magnetic Properties of NiFe_2O_4 Nanoparticles

摘要

The present work deals with the synthesis, structural and magnetic characterizations of pure and zinc doped nickel ferrite (NiFe_2O_4 and Ni_(0.65)Zn(0.35)Fe_2O_4) nanoparticles. The Ni_(0.65)Zn(0.35)Fe_2O_4) nanoparticles were synthesized by sol-gel auto combustion method. X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) techniques were used for the characterization of the prepared samples. The structural properties were estimated from X-ray diffraction (XRD) studies. The principle absorption bands correspond to octahedral lattice site was observed from FTIR spectra. The average particle size was calculated by using Debye Scherer’s formula and the obtained values are of few nanometer. The M-H curves recorded at room temperature exhibits a typical hysteresis loop indicating that the sample exhibits ferrimagnetic behaviour. The large coercivity (H_c) values indicate nanocrystalline nature of the present samples. The coercivity, saturation magnetization, remanence magnetization and magneton number found to be influenced by zinc doping.