TY - JOUR
T1 - Growth and charge ordering of epitaxial YbFe2O4 films on sapphire using Fe3O4 buffer layer
AU - Fujii, Tatsuo
AU - Numata, Tomoya
AU - Nakahata, Hiroki
AU - Nakanishi, Makoto
AU - Kano, Jun
AU - Ikeda, Naoshi
N1 - Funding Information:
Acknowledgements This work was partly supported by Grants-in-Aid for the Okayama Foundation for Science and Technology and the Yakumo Foundation for Environmental Science.
Publisher Copyright:
© 2018 The Japan Society of Applied Physics.
PY - 2018/1
Y1 - 2018/1
N2 - 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.
AB - 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.
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U2 - 10.7567/JJAP.57.010305
DO - 10.7567/JJAP.57.010305
M3 - Article
AN - SCOPUS:85040335555
SN - 0021-4922
VL - 57
JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
IS - 1
M1 - 010305
ER -