Multilayer rippled structure of the NiAl(110) surface: A medium energy ion scattering study

The NiAl(110) surface structure has been studied with medium energy ion scattering in a channeling and blocking (MEIS/CB) experiment. A high sensitivity to the first layer ripple (10% ripple with the Al on top) is reported and a multilayer model is proposed. The first layer Ni atoms are contracted r...

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Bibliographic Details
Published in:Surface science 1987-05, Vol.183 (3), p.556-564
Main Authors: Yalisove, S.M., Graham, W.R.
Format: Article
Language:English
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Summary:The NiAl(110) surface structure has been studied with medium energy ion scattering in a channeling and blocking (MEIS/CB) experiment. A high sensitivity to the first layer ripple (10% ripple with the Al on top) is reported and a multilayer model is proposed. The first layer Ni atoms are contracted relative to the second layer Ni atoms by 7%, and the second layer Ni atoms are expanded relative to the third layer Ni atoms by 1%. The first layer Al atoms are expanded relative to the second layer Al atoms by 5%, and the second layer Al atoms are contracted relative to the third layer Al atoms by 1%. The model assumes bulk-like positions of the third layer for both Ni and Al atoms. The present results are in excellent agreement with a recent single layer LEED intensity analysis.
ISSN:0039-6028
1879-2758
DOI:10.1016/S0039-6028(87)80227-3