Abstract

The phenomena of cooperative Jahn–Teller distortion, orbital ordering and spin exchange in magnetic solids were examined in terms of orbital interactions between adjacent spin sites. Cooperative Jahn–Teller distortion and orbital ordering of a magnetic solid occur to minimize the two-electron two-orbital destabilizing interactions between adjacent spin sites. The magnetic structures of cubic perovskites KCuF3, LaMnO3 and YVO3 are well accounted for in terms of the spin exchange interactions associated with their ordered magnetic orbitals.

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