2D ferromagnetic fluctuation above TN in orbital-ordered LaMnO3

C. T. Chen*, H. H. Wu, B. N. Lin, Y. Y. Hsu, H. C. Ku

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Onset of two-dimensional (2D) ferromagnetic (FM) short-range order with T2D≃150 K above A-type antiferromagnetic (AF) Néel temperature TN = 139 K was observed in 100 G low field for orbital-ordered LaMnO3. The A-type AF long-range order is stabilized through strong 2D basal plane FM superexchange coupling of orbital-ordered eg electrons and weak c-axis AF coupling. Both T2D and TN are field dependent, and merge in 1 T high field around 130 K. Mn K-edge X-ray absorption near-edge spectrum for orbital-ordered LaMnO 3 at room temperature indicates a pre-edge splitting of 2.0 eV due to weakly allowed 1s-3d dipole transition.

Original languageEnglish
Pages (from-to)829-830
Number of pages2
JournalPhysica B: Condensed Matter
Issue numberII
Publication statusPublished - 2003 May
Externally publishedYes


  • 2D FM short range fluctuation
  • A-type AF order
  • Orbital order

ASJC Scopus subject areas

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


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