Magnetic and orbital excitations in manganese oxides

W. Koshibae, S. Ishihara, Y. Kawamura, S. Okamoto, J. Inoue, S. Maekawa

Research output: Contribution to journalArticlepeer-review


The magnetic and orbital structures in manganese oxides with perovskite structure are examined by using the exact diagonalization method on finite-size clusters. The orbital degeneracy in the eg states is taken into account based on the effective Hamiltonian derived in the insulating state with strong Coulomb interaction. It is shown that A-, C- and G-type antiferromagnetic orderings occur as a result of competition or cooperation of the superexchange interaction of t2g spins and the coupling between spins and orbitals. The spin and orbital excitations are also examined.

Original languageEnglish
Pages (from-to)1058-1060
Number of pages3
JournalPhysica B: Condensed Matter
Publication statusPublished - 1997 Feb
Externally publishedYes


  • Exact diagonalization
  • LaMnO
  • Spin and orbital wave

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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