Abstract
MgGd0.15Fe1.85O4 ferrite with improved magnetic and electrical properties has been synthesized by solid state reaction technique and has been investigated for microstructures, magnetic and electric properties. The electric and magnetic properties of MgGd0.15Fe1.85O4 ferrite have been studied as a function of frequency and temperature. The dc electrical resistivity of MgGd0.15Fe1.85O4 ferrite was found to increase up to 90 times more as compared to MgFe2O4 ferrite. The value of saturation magnetization (Msat) has been increased from 30.70 emu/gm to 41.5 emug/m and remnant magnetization (Mr) of MgGd0.15Fe1.85O4 ferrite was found to be increase up three times as compared to Mg ferrite. The values of saturation magnetization, remnant magnetization and initial permeability have been increased due to the replacement of Fe3+ ions by Gd3+ ions in Mg ferrite. High resistivity and improved magnetic properties (Msat, Mr) can be correlated with better compositional stoichiometry and the replacement of Fe3+ ions by Gd3+ ions. The mechanisms responsible to these results have been discussed in this paper.
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