Photoemission study on oxidation of the YCu intermetallic compound on Cu(100) surface
| Autor: | Wu Jianxin, Zhu Jingsheng, Liu Xianming |
|---|---|
| Rok vydání: | 1997 |
| Předmět: |
Annealing (metallurgy)
Inorganic chemistry Oxide Intermetallic General Physics and Astronomy chemistry.chemical_element Surfaces and Interfaces General Chemistry Yttrium Condensed Matter Physics Oxygen Surfaces Coatings and Films Metal chemistry.chemical_compound chemistry X-ray photoelectron spectroscopy visual_art visual_art.visual_art_medium Physical chemistry Ultraviolet photoelectron spectroscopy |
| Zdroj: | Applied Surface Science. 108:237-244 |
| ISSN: | 0169-4332 |
| DOI: | 10.1016/s0169-4332(96)00577-6 |
| Popis: | Oxidation of YCu intermetallic compound on the Cu(100) surface at room temperature has been studied by X-ray photoelectron spectroscopy and ultraviolet photoelectron spectroscopy. It is found that the YCu compound films are easily oxidized to form ytrium oxide at room temperature. The formed oxide prevents the Y atoms from diffusing into the topmost surface. Valence band and core level photoelectron spectra indicate the presence of chemisorbed oxygen species (O − ) which are formed on top of the yttrium oxide at high oxygen exposure. On annealing, the O − ions can react with metallic yttrium continuously at medium temperature, and a uniform Y 2 O 3 layer is formed on the Cu(100) surface. |
| Databáze: | OpenAIRE |
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