Influence of Jahn–Teller Ordering on the Structural and Magnetic Phase Transitions in Lightly Doped Manganites

摘要

Processes of the mutual influence of Jahn–Teller and magnetic orderings in lightly doped lanthanum–strontium manganites of the composition La_(1 – x)Sr_xMnO_3 (0.12 < x < 0.18) are considered. A correspondence between the local (or cooperative) distortion of the oxygen octahedra MnO_6 and the types of the orbital ordering of electron orbitals is established, based on a comprehensive study of the temperature behavior of the elastic moduli, magnetization, and electrical conductivity.