structure and magnetic properties of oxide nanoparticles of fe-co-ni synthesized by co-precipitation method

oxide nanoparticles of fe-co-ni were prepared in six different compositions by co-precipitation method. the as-synthesized nanoparticles were characterized by x-ray diffraction (xrd), field emission scanning electron microscope (fesem), fourier transform infrared (ft-ir) and vibrating sample magnetometer  (vsm). it was found that the nanoparticles had mean crystalline size of 30-55 nm and spherical shape. specific surface area of the nanoparticles was between 27.47x104 cm2/g to 141.4x104 cm2/g which had been calculated by x-ray diffraction data. the magnetic measurements of nanoparticles were done at room temperature and found that nanoparticles exhibit a ferromagnetic behavior with different values of saturation magnetization and coercivity.