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

  • Yumi H. Ikuhara (a1), Xiuliang Ma (a2), Yuji Iwamoto (a3), Yuichi Ikuhara (a2), Koichi Kikuta (a4) and Shin-ichi Hirano (a4)...

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

  • Yumi H. Ikuhara (a1), Xiuliang Ma (a2), Yuji Iwamoto (a3), Yuichi Ikuhara (a2), Koichi Kikuta (a4) and Shin-ichi Hirano (a4)...

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