Synthesis, Characterization and Electrical Admittance Study of LaCrO3Perovskite Compound

Abstract

We synthesized the ferroelectric perovskite oxide LaCrO3 (LCO) using solid-state reaction method. Scanning electron microscope (SEM),energy x-ray dispersive (EDX) and X-ray diffraction (XRD) have been employed to study structural and chemical analysis of synthesizedpowder, respectively. Electrical admittance properties of the perovskite oxide sample was performed in wide range frequency (1Hz-10MHz) and temperature (-100 °C to +100 °C) using dielectric/impedance spectrometer. The results showed that the LCO has differentactivation energies and the calculated activation energies are of 0.175 eV and 0.220 eV from the Gdc vs. 1000/T and 0.152 eV and 0.197eV from the fmin vs. 1000/T plots, respectively. The temperature-dependent exponent s showed that the overlapping large polaron tunneling(OLPT), quantum mechanical tunneling (QMT) and the correlated barrier hopping (CBH) conduction mechanism models can be suggestedfor the LCO compound.