MAGNETIC AND DIELECTRIC PROPERTIES OF Ni0.4Co0.4Zn0.2LaxFe2-xO4 NANOFERRITE USING SOL GEL AUTO COMBUSTION METHOD.

The rare earth La3+ doped in Nickel-Cobalt-Zinc nanocrystalline ferrite was prepared by sol-gel auto combustion method. The magnetic properties were studied using the Vibrating Sample Magnetometer (VSM). It was found that Magnetic remanance (Mr) and Magnetic saturation (Ms) of prepared nanoparticles decreases as increase in La3+content. The values of Mr/Ms loop squareness ratio of prepared nanoparticles were calculated. The magnetic moment per formula unit in Bohr magneton decreases as Lanthanum concentration increases and magnetic anisotropy was calculated. The dielectric constant and dielectric loss decreases with increase in frequencies which gives the normal behavior.