Studies on Real and Imaginary Part of Permeability for Sm–Dy Substituted Mg Ferrite

Abstract

The ferrite samples having composition Mg[(Sm)0.5(Dy)0.5]xFe2‐xO4, in which x varies from 0.05 to 0.3 in steps of 0.05 have been prepared by using combustion method. X‐ray diffraction analysis confirmed the formation of cubic spinel structure in addition of ortho‐ferrite phase due to substitution of rare earth ions. The initial permeability and complex permeability of toroid samples are calculated by measuring the values of inductance and Q‐factor. It is seen that initial permeability and real part of initial permeability increases with increase in Samarium(Sm)–Dysprosium (Dy) rare earth element in magnetium (Mg) up to x = 0.15 and thereafter it decreases. The composition Mg[(Sm)0.5(Dy)0.5]0.15Fe1.85O4 show low loss factor and initial permeability becomes higher as compared to other prepared rare earth content samples.