In this work, we study the structural and dielectric properties of La0.5Pr0.3Ba0.2Mn1-xTixO3 (x = 0.0 and 0.1) samples prepared using the solid-state reaction technique. The X-ray structural analysis using Rietveld refinement method exhibits that both compounds are single phase and crystallize in the rhombohedral structure with R \({ }\overline{3}{ }\) C space group. In addition, a scanning electron microscopy (SEM) study proved an increase in the grain size with substitution of Mn by Ti in the B site. The dielectric properties of these compounds have been studied by complex impedance spectroscopy in the frequency range from 40 Hz to 1000 kHz and temperatures from 100 K to 200 K. The DC conductivity decreases with the substitution of Ti, and the experimental data were fitted by Jonscher’s universal power law. The impedance plot exhibits semicircle arcs at different temperatures. Similarly, the variations of imaginary parts of modulus and impedance show an electrical relaxation phenomenon with non-Debye nature for both samples. The values of the activation energy are determined from the conductivity data analysis and imaginary impedance.

在这项工作中，我们研究了 使用固态反应技术制备的La0.5Pr0.3Ba0.2Mn1-xTixO3（x = 0.0和0.1）样品的结构和介电性能。使用Rietveld精炼方法的X射线结构分析表明，两种化合物均为单相，并且在菱形结构中具有R \（{} \ overline {3} {} \）结晶C空间组。另外，扫描电子显微镜（SEM）研究证明，晶粒尺寸的增加是通过在B位置用Ti代替Mn来实现的。这些化合物的介电性能已通过复阻抗谱在40 Hz至1000 kHz的频率范围内以及100 K至200 K的温度范围内进行了研究。直流电导率随Ti的取代而降低，并且实验数据由Jonscher's普遍权力法。阻抗图在不同温度下显示出半圆弧。类似地，对于两个样品，模量和阻抗的虚部的变化都显示出具有非德拜性质的电弛豫现象。活化能的值由电导率数据分析和虚阻抗确定。