Magnetic and dielectric properties of HoFe2O4 and R1-xR′xFe2O4 (R, R′: Rare earths)

Kenji Yoshii, Yasuhiro Yoneda, Daisuke Maeda, Yusuke Yokota, Takamasa Michiuchi, Takuma Komatsu, Naoshi Ikeda, Yoji Matsuo, Shigeo Mori

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Abstract

Rare-earth iron oxides of the form RFe2O4 (R = Y, Ho-Lu) show a new mechanism of ferroelectricity owing to the charge ordering of Fe ions below ∼330 K. To determine the physical properties of this system, the magnetic and dielectric properties of HoFe2O4 and R1-xR′xFe2O4 were investigated (R, R′: rare earths). All the materials showed dielectric constants of ∼1000-10000, as reported for some other RFe2O4 oxides. For HoFe2O4, magnetic ordering occurred at a temperature lower than those of RFe2O4 reported thus far. On the other hand, the dielectric measurements of this material suggested the development of a correlation between polar regions at higher temperatures, which was also observed for the Sc-substituted system Lu1-xScxFe 2O4. These results encourage detailed investigations of these materials from the viewpoints of both fundamental and applied sciences, and suggest the existence of other new properties of RFe2O 4.

Original languageEnglish
Pages (from-to)7599-7602
Number of pages4
JournalJapanese journal of applied physics
Volume47
Issue number9 PART 2
DOIs
Publication statusPublished - Sep 19 2008

Keywords

  • Charge ordering
  • Dielectric property
  • Magnetic property
  • Multiferroic

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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    Yoshii, K., Yoneda, Y., Maeda, D., Yokota, Y., Michiuchi, T., Komatsu, T., Ikeda, N., Matsuo, Y., & Mori, S. (2008). Magnetic and dielectric properties of HoFe2O4 and R1-xR′xFe2O4 (R, R′: Rare earths). Japanese journal of applied physics, 47(9 PART 2), 7599-7602. https://doi.org/10.1143/JJAP.47.7599