Processing of epitazial LiMn_2O_4 thin film on MgO(110) through metalorganic precursor

摘要

Epitaxial LiMO_2O_4 was successfully synthesized by coating a (Li-Mo-O) metalorganic precursor solution onto MgO (110) substrates at temperatures as low as 350deg C. Cross-sectional transmission electron microscopy observation revealed that the orientation relationship between LiMn_2O_4 and MgO was (111)_(LiMn_2O_4)//(111)_(MgO), (110)_(LiMn_2O_4)//(110)_(MgO), and (112)_(LiMn_2O_4)//(112)_(MgO), which resulted in the (111)_( LiMn_2O_4) planes growing perpendicular to the surface plane of MgO. The interface structure consisted of (111) layers of Mn atoms in the LiMn_2O_4 crystal aligned with the Mg atoms in the (111) planes of the MgO substrate when viewed along the (112) direction.