Abstract
We have measured temperature dependent impedance spectra of LuFe2O4 multiferroic polycrystalline samples in the temperature range of 100–400 K, in a wide frequency range of measuring AC voltage: from 20 Hz to 120 MHz. In spectra measured at 30–70 MHz and at 200–260 К, we observed anomalous positive temperature coefficient of resistance. We explain the anomaly on the basis of the generalized barrier model.
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