Ferroelectricity from electron ordering

Naoahi Ikeda, Shigeo Mori, Kenji Yoshii, Yoji Matsuo

Research output: Chapter in Book/Report/Conference proceedingConference contribution


We report ferroelectricity in the triangular mixed valence material RFe2O4 (R=Y, Dy, Ho, Er, Tm, Yb, Lu). This ferroelectricity originates from the polar ordering of Fe3+ and Fe2+ or the polar ordering of electrons on Fe3+. The electric polarization arising from such electron ordering may not couple with the lattice modulation. The ordering process of Fe 2+ and Fe3+ are explained by the frustrated interaction of charges in a triangular lattice. The ferroelectric property of this material is present at room temperature.

Original languageEnglish
Title of host publicationFerroelectrics and Multiferroics
Number of pages9
Publication statusPublished - Dec 1 2006
Event2006 MRS Fall Meeting - Boston, MA, United States
Duration: Nov 27 2006Dec 1 2006

Publication series

NameMaterials Research Society Symposium Proceedings
ISSN (Print)0272-9172


Other2006 MRS Fall Meeting
Country/TerritoryUnited States
CityBoston, MA

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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