The spin, charge,+ and orbital ordering in A0.5A0.5MnO3 and R0.5A1.5MnO4 (R=rare earth, A=Sr, Ca) has been studied by means of unrestricted Hartree-Fock calculations on the multiband p-d model. Since the superexchange interaction between the Mn3+ and Mn4+ sites depends on which type of eg orbital is occupied at the Mn3+ site, antiferromagnetic states such as A type and CE type favor a specific orbital ordering. It is shown that the Jahn-Teller distortion consistent with the orbital ordering plays an essential role in stabilizing the experimentally observed antiferromagnetic states.
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|Publication status||Published - 1997 Jul 1|
ASJC Scopus subject areas
- Condensed Matter Physics