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Interfaces between solution-derived LiMn2O4 thin films and MgO and Au/MgO substrates

Published online by Cambridge University Press:  31 January 2011

Yumi H. Ikuhara
Affiliation:
Japan Fine Ceramics Center, 2–4–1 Mutsuno, Atsuta-ku, 456–8587, Nagoya, Japan
Xiuliang Ma
Affiliation:
Engineering Research Institute, University of Tokyo 2–11–16, Yayoi, Bunkyo-ku 113–8656, Tokyo, Japan
Yuji Iwamoto
Affiliation:
Japan Fine Ceramics Center, 2–4-1 Mutsuno, Atsuta-ku, 456–8587, Nagoya, Japan
Yuichi Ikuhara
Affiliation:
Engineering Research Institute, University of Tokyo 2–11–16, Yayoi, Bunkyo-ku 113–8656, Tokyo, Japan
Koichi Kikuta
Affiliation:
Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, 464–8603, Nagoya, Japan
Shin-ichi Hirano
Affiliation:
Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, 464–8603, Nagoya, Japan
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Abstract

Spinel LiMn2O4 thin films have been prepared on MgO(110) and Au/MgO(110) substrates by a chemical solution deposition method. The interfaces between film and substrate were characterized by means of high-resolution transmission electron microscopy (HREM) as well as x-ray diffraction. Cross-sectional HREM observation revealed that LiMn2O4 films grew epitaxially on the MgO(110) and Au/MgO(110) substrates. In the LiMn2O4/MgO system, misfit dislocations formed to accommodate the lattice strain at the LiMn2O4/MgO interface. In the LiMn2O4/Au/MgO system, Au grew epitaxially on the MgO substrate with its surface facetted along {111} planes, probably because the surface energy of this plane is relatively low. The formation of these facets is considered to have a favorable effect on the growth of {111} planes of LiMn2O4 when deposited on the Au film.

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Copyright
Copyright © Materials Research Society 2002

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