Structure and chemical states of highly eptiaxial CeO2（001） films grown on SrTiO3 substrate by laser molecular beam epitaxy
来源期刊：JOURNAL OF RARE EARTHS2013年第12期
论文作者：张俊 魏峰 杨志民 陈秋云 陈军 王书明
文章页码：1191 - 1194
摘 要：Highly epitaxial and pure（001）-oriented CeO2films were grown on SrTiO3（001）substrates by laser molecular beam epitaxy method without any gas ambient.Layer-by-layer epitaxial growth mode of CeO2was confirmed by in situ reflection high-energy electron diffraction（RHEED）observations.High-resolution X-ray diffraction（HRXRD）and high-resolution transmission electron microscopy（HRTEM）results indicated the STO（100）//CeO2（100）,STO[100]//CeO2[110]epitaxial relationship for out-of-plane and in-plane,respectively.The formation mechanism of the epitaxial film was also discussed in the light of a theoretical model.Chemical states of the LMBE ceria films were evaluated and evidences for the existence of Ce3+and oxygen vacancies were presented.
张俊1，魏峰1，杨志民1，陈秋云2，陈军2，王书明3
1. Advanced Electronic Materials Institute,General Research Institute for Nonferrous Metals2. Science and Technology on Surface Physics and Chemistry Laboratory3. National Center of Analysis and Testing for Nonferrous Metals and Electronic Materials,General Research Institute for Nonferrous Metals
摘 要：Highly epitaxial and pure（001）-oriented CeO2films were grown on SrTiO3（001）substrates by laser molecular beam epitaxy method without any gas ambient.Layer-by-layer epitaxial growth mode of CeO2was confirmed by in situ reflection high-energy electron diffraction（RHEED）observations.High-resolution X-ray diffraction（HRXRD）and high-resolution transmission electron microscopy（HRTEM）results indicated the STO（100）//CeO2（100）,STO[100]//CeO2[110]epitaxial relationship for out-of-plane and in-plane,respectively.The formation mechanism of the epitaxial film was also discussed in the light of a theoretical model.Chemical states of the LMBE ceria films were evaluated and evidences for the existence of Ce3+and oxygen vacancies were presented.
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