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.
|Number of pages||4|
|Journal||Physica Status Solidi (C) Current Topics in Solid State Physics|
|Publication status||Published - Jun 1 2015|
- Iron oxide
ASJC Scopus subject areas
- Condensed Matter Physics