Electric and dielectric properties of MgGd0.1Fe1.9O4 ferrite

MgGd0.1Fe1.9O4 ferrite with improved electrical and dielectric properties has been synthesized by conventional ceramic technique. X-ray analysis confirmed the single-phase inverse spinel structure of the ferrite. The dc resistivity is increased by one order of magnitude as compared to Magnesium ferrite. The dielectric loss of the sample investigated at room temperature is only 3 x 10(-3) at 3 MHz. High resistivity and low dielectric loss can be correlated with better compositional stoichiometry, size and nature of the additives. The variation of dielectric properties of the sample as a function of frequency in the range 0.1-20 MHz has been studied at different temperatures. In addition to this, the electric and dielectric properties have been studied as a function of temperature. Possible mechanisms contributing to the results have been discussed minutely in this paper. (C) 2009 Elsevier B.V. All rights reserved.