Growth and charge ordering of epitaxial YbFe2O4 films on sapphire using Fe3O4 buffer layer

Tatsuo Fujii, Tomoya Numata, Hiroki Nakahata, Makoto Nakanishi, Jun Kano, Naoshi Ikeda

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Well-crystallized epitaxial YbFe2O4 films were prepared on an α-Al2O3(001) substrate using an Fe3O4 buffer layer. Fe3O4 has a relatively small lattice mismatch with both YbFe2O4 and α-Al2O3. Electron diffraction analysis combined with transmission electron microscopy revealed the epitaxial relationship to be α-Al2O3[110](001) ∥ Fe3O4[](111) ∥ YbFe2O4[110](001). Moreover, superlattice spots due the Fe2+-Fe3+ charge order state of YbFe2O4 were clarified. The Fe2+/Fe3+ ratio in YbFe2O4 was nearly stoichiometric. The film exhibited a ferrimagnetic transition at ∼220 K and a nonlinear current-voltage characteristic at room temperature. These results confirmed the good crystallinity and stoichiometry of the obtained YbFe2O4 films.

Original languageEnglish
Article number010305
JournalJapanese Journal of Applied Physics
Volume57
Issue number1
DOIs
Publication statusPublished - Jan 1 2018

ASJC Scopus subject areas

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

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