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Preferential surface oxidation of Gd in Gd5Ge4 |
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| Authors: | Chad D Yuen Gordon J Miller Patricia A Thiel |
| Institution: | a Ames Laboratory, Iowa State University, Ames, IA 50011, United States b Department of Chemistry, Iowa State University, Ames, IA 50011, United States c Department of Material Science and Engineering, Iowa State University, Ames, IA 50011, United States |
| Abstract: | Gd oxidizes preferentially at the (0 1 0) surface of Gd5Ge4. This is consistent with thermodynamic data for the bulk oxides. Upon oxidation in vacuum, the gadolinium oxide displaces or covers the Ge. Oxidation is more extensive at 600 K than at 300 K, because more oxygen is incorporated into the surface and the shift of the Gd binding energy is larger. |
| Keywords: | Binary alloy X-ray photoelectron spectroscopy Oxidation |
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