Structural, electric, and dielectric characterizations of La0.5Pr0.2Sr0.3Mn1−xFexO3 perovskite prepared by self combustion method

Polycrystalline of La 0 . 5 Pr 0 . 2 Sr 0 . 3 Mn (1−x) Fe x O 3 (x = 0, 0.15 and 0.2) samples have been elaborated by the self-combustion reaction method. Single-phase compound formation was confirmed by preliminary X-ray structural analysis. Detailed studies of the electric and dielectric properties of the compound in the frequency range from 100 Hz to 1 MHz and temperatures between 100 and 400K were investigated using the impedance spectroscopy technique. The results show that all samples exhibit dependence of both ac and dc conductivity on the iron content. Furthermore, the values of dielectric loss, dielectric loss tangent, real and imaginary parts of the impedance, real and imaginary parts of the electrical modulus, ac and dc electrical conductivity were found considerably sensitive to both temperature and applied frequency.