Abstract
The present study elucidates the temperature and frequency-dependent electrical properties of α-Fe2O3 synthesised by co-precipitation method. XRD and Raman spectroscopy are employed to study the formation and crystal structure of the material. The material shows two relaxation peaks in the frequency range 1 Hz–1 MHz. The ac electrical data of the material are analysed with the novel relaxation function combining conduction and dielectric relaxations. The results reveal that the material possesses two types of dipoles, one corresponds to the free dipoles of FeO6 molecules, and the other corresponds to the pinned dipoles created by charge carriers and ion lattice. The dc conductivity, conduction relaxation time and dielectric relaxation time obey Arrhenius law.
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