Investigation of the structural, electrical, and dielectric properties of La<sub>0.5</sub>Sm<sub>0.2</sub>Sr<sub>0.3</sub>Mn<sub>1−<i>x</i></sub>Cr<sub><i>x</i></sub>O<sub>3</sub> for electrical application
Khouloud Abdouli, F. Hassini, W. Chérif, P.R. Prezas, M.P.F. Graça, M. A. Valent, Olfa Messaoudi, Sarra Elgharbi, A. Dhahri, Leila Manai
Abstract
). The studied samples were also characterized by complex impedance spectroscopy in a wide range of temperatures and frequency. AC conductivity analyses are used to study the transport property of the investigated samples. These analyses indicate that the conduction mechanism is strongly dependent on temperature and frequency. It is also found that the conductivity decreases with Cr concentration. Complex impedance analysis confirms the contributions of grain and grain boundaries in the conduction mechanism. Finally, the impedance spectra, characterized by the appearance of semicircle arcs at different temperatures, were well modeled in terms of equivalent electrical circuits to explain the impedance results.