Abstract
The electrical impedance of Y2NiMnO6 ceramics sintered at 1400 °C for 6 to 24 hours were investigated. The electrical properties of Y2NiMnO6 ceramics were examined in dc bias from 0 volt to 1.5 volt at room temperature. At frequencies below 105 Hz the high electric impedance decreased significantly with longer sintering time, indicating that the grain and grain boundary effects. Increasing dc bias also reduced impedance at the lower frequencies, with polarisation affect at higher frequencies. This behaviour suggests a decrease in the relaxation time of the mobile charge carriers with increasing dc bias and describes a thermally activated relaxation phenomena in the Y2NiMnO6 ceramics.
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