Synchrotron observation of the charge ordering and spontaneous polarization in LuFe2O4

Naoshi Ikeda, Masahiko Tanaka, Hijiri Kitô, Satoshi Sasaki, Yasusada Yamada

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3 Citations (Scopus)

Abstract

We report a synchrotron orbital radiation study of a charge ordering in a triangular mixed valence system LuFe2O4. Using the X-ray anomalous dispersion method near the iron K-shell absorption edge, we confirmed a superstructure of Fe2+ and Fe3+ on the triangular lattice with a configuration of a √3 × √3 × 2 structure. This charge structure shows a spontaneous polarization. The existence of two dimensional charge ordering above 330K was deduced from the temperature dependence of the energy dispersion for the superlattice reflection.

Original languageEnglish
Pages (from-to)227-235
Number of pages9
JournalFerroelectrics
Volume222
Issue number1-4
DOIs
Publication statusPublished - Jan 1 1999
Externally publishedYes

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Keywords

  • Anomalous X-ray dispersion
  • Charge frustration
  • Charge order
  • LuFeO
  • RFeO
  • SOR experiment

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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