State of atoms and interatomic interactions in perovskite-like oxides: XXII. Effect of the Ca-Sr ratio on exchange interactions in lanthanum manganites doped with calcium and strontium

Magnetic properties of lanthanum manganites of the perovskite structure, doped with calcium and strontium in various ratios, were studied. Magnetic dilution experiments and analysis of the temperature and concentration dependences of the magnetic characteristics showed that the properties of the manganites under consideration nonmonotonically depend on the Ca-Sr ratio in the lanthanum sublattice.