AC impedance studies on LiFe5−xMnxO8 ferrites

A systematic investigation of AC impedance studies of Mn doped Lithium ferrites with composition formula, LiFe5−xMnxO8 (x = 0.0, 0.2, 0.4, and 0.6) has been undertaken. The materials were prepared by sol–gel method. Complex impedance data measured in the frequency range 200 Hz to 1 MHz at different temperatures was analyzed systematically. It has been observed that the magnitudes of real (Z′) and imaginary (Z″) components of the impedance are found to decrease with increasing temperature. It is interesting to note that the relaxation time varies linearly with temperature. The Nyquist impedance plots of the present investigation clearly depicts the inherent phenomenon involved in conduction mechanism of Mn doped Lithium ferrites.

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► The materials were prepared by sol–gel method and single phase formation was conformed.
► Z′ and Z″ magnitude decrease with increasing temperature.
► Relaxation time of the prepared samples varies linearly with temperature
► The cole–cole impedance plots of the present investigation clearly shows an interesting phenomenon involved in the conduction mechanism of the samples.