Phase transition in perovskite manganites with orbital degree of freedom

S. Okamoto, S. Ishihara, S. Maekawa

Research output: Contribution to journalArticlepeer-review

33 Citations (Scopus)

Abstract

Roles of orbital degree of freedom of Mn ions in phase transition as functions of temperature and hole concentration in perovskite manganites are studied. It is shown that the orbital order-disorder transition is of the first order in the wide region of hole concentration, and the Néel temperature for the anisotropic spin ordering, such as the layer-type antiferromagnetic one, is lower than the orbital ordering temperature due to the anisotropy in the orbital space. The calculated results of the temperature dependence of the spin and orbital order parameters explain a variety of the experiments observed in manganites.

Original languageEnglish
Pages (from-to)14647-14655
Number of pages9
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume61
Issue number21
DOIs
Publication statusPublished - 2000

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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