Abstract:
Pr1−xSrxMnO3 manganites (x = 0; 0.15; 0.25) were synthesized by the solid-phase method at a temperature of 1250∘C and have an orthorhombic perovskite-like structure (space group Pbnm). A comprehensive study of the effect of praseodymium substitution with strontium on the temperature features of the transformation of the crystal structure of the studied perovskites was performed using high-temperature radiography and differential thermal analysis. It was determined that the temperature of the Jahn-Тeller effect significantly decreases with the introduction of strontium. It is established that all samples have a semiconductor character of conductivity. Strontium doping significantly increases the electrical conductivity of praseodymium manganites, especially at temperatures below 450∘C.
This work was supported within a state assignment to the Institute of Metallurgy, Ural Branch, Russian Academy of Sciences, and performed using the facilities of the Center for Collective Use “Ural-M”.
Citation:
L. B. Vedmid', O. M. Fedorova, V. B. Balakireva, V. A. Vorotnikov, V. F. Balakirev, “Structure and electrical conductivity of the perovskites Pr1−xSrxMnO3 (x = 0; 0.15; 0.25)”, Fizika Tverdogo Tela, 63:4 (2021), 465–470; Phys. Solid State, 63:4 (2021), 660–665