Structural and AC magnetic properties of (Ni0.4Cu0.15Zn0.45)1-xMnxFe2O4(x=0.30, 0.45) due to Mn substitution

Abstract

Structural and magnetic properties of (Ni0.4Cu0.15Zn0.45)1-xMnxFe2O4 ferrites(x=0.3, x=0.45) were investigated and it was prepared by solid state reaction methods. Various chemical compositions were calcined at 950C, and samples prepared from these compositions were sintered at 1100C in air for 5 hours. The X-ray diffraction analysis, SEM and EDS results were performed for the samples sintered at 1100C temperature. X-ray diffraction pattern confirms the formation of single phase spinel structure and the lattice parameter which resulted in increasing with the increase of Mn2+. The compositions show a decrease in bulk and theoretical density with increase of Mn2+ that can be explained by the atomic weights of the doped and substituted elements. It is also observed that porosity increases, while gain size decreases with increasing of Mn content. EDS report shows the homogeneous distribution of elements in the samples. The permeability curves have shown a quite variation while being sintered at different temperatures. However, the real part is always higher for all temperatures when Mn is absent from the composition. With each content increment, real part of permeability decreases with x=0.3 to x=0.45 at 1100, 1150 and 12000C. Natural resonance frequency is noticed to be decreased with temperature rising, although it rises with increasing Mn content.