Study of the variation of resistivity, permeability and curie temperature of rare earth metal Yttrium (Y) substitution on Ni0.60Zn0.40?xYxFe2O4 (x=0.05, 0.10, 0.15) ferrites

In this research work, ferrites with compositions of Ni_0.60Zn_0.40-xRe_xFe₂O₄ where x=0.05, 0.10, 0.15 were prepared by double sintering ceramic technique. The samples were pre sintered at 10000 C for 4 hours in air and sintered at 1250° C for 3 hours. The influence of Yttrium (Y) substitution on various properties of Ni-Zn ferrites have been studied in this work. Investigations were carried out by the measurements of AC resistivity, Permeability and Curie temperature of the sample. AC resistivity shows the nature of the semiconductor of the samples. The initial magnetic permeability remains constant from low frequency to 10 MHz thenceforth sharply fall to very low values at higher frequencies and again remain constant onward to Zn deficient of Ni -Zn ferrites with substituting of Y. At T = Tc the sharp directress of permeability indicates the samples are good homogeneity.