Effect of Mg and La substitution on Electromagnetic Properties of Ni-Cu-Zn Ferrite

Abstract

NiCuZn ferrite is a very important material for multilayer chip inductor core material. La & Mg substituted NiCuZn ferrites have been reported in different literature for their improved electromagnetic properties. However there is no report of simultaneous substitution La and Mg in NiCu Zn ferrite. The present project focuses on the effect of simultaneous substitution of Mg and La in NiCuZn ferrite. All the compositions were synthesized through auto-combustion method. The nano-crystalline ferrite powders were successfully synthesized by this method. The powders were characterized for their phase formation using XRD. After calcination at 7000C the powders were pressed in to pellet and toroid specimens. The specimens were sintered at different temperatures and characterized for their bulk density, microstructural development, dielectric and ferromagnetic properties. Initial permeability of all the ferrites was measured on toroid specimen using LCR meter. Magnetization behavior was investigated in a magnetometer. On an average the electromagnetic properties of La doped NiCuZn ferrite enhanced compare to Mg – substituted ferrite.