Study of Structural, Magnetic and Electrical Properties of the Rare-Earth Manganite La0.2235Pr0.2235Nd0.2235Sr0.33MnO3

The perovskite-type La0.2235Pr0.2235Nd0.2235Sr0.33MnO3 (LPNSM) ceramic sample was prepared using the solid-state reaction at high temperature. The material was subjected to X-ray diffraction and found to crystallize in rhombohedral structure with space group \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$\mathrm{R}\bar{3}\mathrm{c}$\end{document}. Physical characterization of this compound was carried out using magnetization and dielectric properties. From the magnetic characterization of this compound, the existence of a transition from ferromagnetic to paramagnetic at the Curie temperature TC=289 K was deduced. This TC-value is in good agreement with the ones obtained from the Curie–Weiss law (1/ε′ vs. T). After characterizing this material, a systematic investigation of dielectric properties as a function of temperature was undertaken. It has been found that the sample shows high dielectric constant and diffuse phase transition (DPT) above room temperature. The scaling behavior of the imaginary part of electric modulus, M″ suggests that the relaxation describes the same mechanism at various temperatures in LPNSM.