Electronic ferroelectricity from charge ordering in RFe2O 4

Naoshi Ikeda, S. Mori, K. Yoshii, Y. Matsuo

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

Abstract

We report a novel ferroelectricity arise from the polar ordering of Fe 3+ and Fe2+ in a mixed valence triangular lattice oxide LuFe2O4, where the electric polarization do not arise from the ionic displacement. The polar ordering of Fe3+ and Fe 2+ was confirmed with a resonant X-ray scattering study in SPring-8. The origin of such ordering is the competitive interaction between Fe 3+ and Fe2+ in the triangular lattice, i.e. the charge frustration. The polar superlattice of Fe3+ and Fe2+ develops below 350K where the electric polarization appears. The ferroelectricity arising from the polar charge ordering or the polar electron distribution may have a great potential for the future application of ferroelectrics.

Original languageEnglish
Title of host publicationIEEE International Symposium on Applications of Ferroelectrics
Pages253-254
Number of pages2
DOIs
Publication statusPublished - 2007
Event2007 16th IEEE International Symposium on the Applications of Ferroelectrics, ISAF - Nara-city, Japan
Duration: May 27 2007May 31 2007

Other

Other2007 16th IEEE International Symposium on the Applications of Ferroelectrics, ISAF
CountryJapan
CityNara-city
Period5/27/075/31/07

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ASJC Scopus subject areas

  • Engineering(all)
  • Materials Science(all)

Cite this

Ikeda, N., Mori, S., Yoshii, K., & Matsuo, Y. (2007). Electronic ferroelectricity from charge ordering in RFe2O 4. In IEEE International Symposium on Applications of Ferroelectrics (pp. 253-254). [4393232] https://doi.org/10.1109/ISAF.2007.4393232