Elemental substitution effects in multiferroic R Fe2O4 (R: Rare earths)

Kenji Yoshii, Takashi Funae, Masaichiro Mizumaki, Hiroki Ejiri, Naoshi Ikeda, Hiroyuki Saitoh, Daiju Matsumura

Research output: Contribution to journalArticle

Abstract

We report the effects of elemental substitutions in multiferroic R Fe2O4 (R: Y, Ho-Lu, In). The substitution by nonmagnetic Ga3+ at the Fe site, which has not been reported so far, shows a drastic decrease in the ferrimagnetic transition temperature (TN). This is plausibly owing to the suppression of magnetic interactions between Fe ions, based on our previous results of other substituted systems such as R FeCoO4. Dielectric constants near room temperature were comparable to those of R Fe2O4. The suppression of dielectric loss in this system is suitable to application. The R -site substitution was also attempted by the large R3+ ions such as Dy3+. The solubility limit was up to ~10% of R ions. TN was raised by 5-10 K for Dy3+ substitution.

Original languageEnglish
Pages (from-to)841-844
Number of pages4
JournalPhysica Status Solidi (C) Current Topics in Solid State Physics
Volume12
Issue number6
DOIs
Publication statusPublished - Jun 1 2015

Keywords

  • EXAFS
  • Iron oxide
  • Multiferroic
  • Substitution

ASJC Scopus subject areas

  • Condensed Matter Physics

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