Atom states and interatomic interactions in perovskite-like oxides: XXXV. Magnetic properties of solid solutions of lanthanum manganites doped with ytterbium and calcium in LaAlO3

Resumo

The solid solutions La_1–YYb_yAlO₃ (y = 0.01–0.20) and La_1–0.397xYb_0.067xCa_0.33xMn_xAl_1–xO₃ (x = 0.01–0.10) were studied by magnetic dilution method. The state of paramagnetic elements and the character of exchange interactions between them were determined on the basis of examination of magnetic properties. Clustering of manganese atoms in the La_1–0.397xYb_0.067xCa_0.33xMn_xAl_1–xO₃ solid solution, as distinct from the La_1–0.67xCa_0.33xMn_xAl_1–xO₃ solid solutions studied before, is determined by the presence of ytterbium atoms in the perovskite structure of the complex oxides under study.