Abstract
The perovskite LaFeO3 ceramic samples were synthesized by the solid-state reaction. The dielectric properties of LaFeO3 were investigated as functions of frequency (102–106Hz) and temperature (80–315K). The sample exhibits colossal dielectric behavior similar to that found in CaCu3Ti4O12. This behavior was linked with a Debye-like relaxation with activation energy of 0.237eV. With the analysis based on Debye's theory and a series of Arrhenius relations, the relaxation was argued to be associated with the hopping motions of charge carriers between Fe2+ and Fe3+, and the relaxation in LaFeO3 in the investigated temperature range was ascribed to be a polaronic relaxation.
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