Effect of Gd³⁺ substitution on dielectric properties of nano cobalt ferrite
2011
Rana, Anu | Thakur, O.P. | Kumar, Vinod
CoGdₓFe₂₋ₓO₄ (x=0.0, 0.1, 0.3, 0.5) nano magnetic ferrite particles were synthesized by chemical co-precipitation method. The variation of dielectric parameters like dielectric constant, dielectric loss, capacitance and resistance for different Gd³⁺ compositions has been measured at room temperature for frequency dependence in the range of 100Hz to 10MHz using impedance analyzer. Results of measurements reveal strong dependence of dielectric parameters on frequency and Gd³⁺ ion content. Dielectric constant, dielectric loss, capacitance and resistance decrease with increasing frequency for all the CoGdₓFe₂₋ₓO₄ compositions. Increase in Gd³⁺ ion composition in material, increases the values of dielectric constant, dielectric loss and capacitance while decreases the electrical resistance of nano-particles. A qualitative explanation is given for the composition and frequency dependence of dielectric parameters.
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