Atomic rippling of a metallic ordered alloy surface–NiAl(110)
| Autor: | H. L. Davis, J. R. Noonan |
|---|---|
| Rok vydání: | 1985 |
| Předmět: |
Diffraction
Nial Materials science Condensed matter physics Metallurgy Composite number Intermetallic Surfaces and Interfaces Condensed Matter Physics Surfaces Coatings and Films Monatomic ion Electron diffraction Electrical resistivity and conductivity Rippling computer computer.programming_language |
| Zdroj: | Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films. 3:1507-1510 |
| ISSN: | 1520-8559 0734-2101 |
| DOI: | 10.1116/1.573161 |
| Popis: | Results from a low‐energy electron diffraction (LEED) analysis of the NiAl(110) surface are presented and discussed. Ordered NiAl has a truncated bulk (110) surface consisting of composite layers of Ni and Al sites which are exactly coplanar. However, the present LEED results demonstrate that the actual NiAl(110) surface has a large rippled relaxation, with the Al sites of the outermost composite layer being 0.22 A above the Ni sites. The agreement achieved between the calculated and experimental I–V profiles, total R factor of 0.053, is of the same quality as that obtained in better LEED analyses of monatomic metallic surfaces, which indicates the evidence for the rippling is quite strong. Also, a qualitative plausibility argument is given to indicate that such rippling is to be expected in surfaces of ordered alloys. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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