مقايسه خواص مغناطيسي نانو ذرات فريت نيكل و فريت روي تهيه شده به وسيله روش عمليات گرمايي

The properties of NiFe2O4 and ZnFe2O4 nanoparticles which were prepared by thermal treatment method at 550 °C were studied. The magnetic properties of samples were demonstrated by vibrating sample magnetometer (VSM) which displayed super paramagnetic and ferromagnetic behaviors for the zinc ferrite and nickel ferrite nanoparticles respectively. Electron paramagnetic resonance (EPR) spectroscopy showed the existence of unpaired electrons for samples.