UNSPECIFIED (2002) Tensor low energy electron diffraction and medium energy ion scattering determination of the Ni(110)c(2 x 2)-Sn surface structure. JOURNAL OF PHYSICS-CONDENSED MATTER, 14 (4). pp. 665-673. ISSN 0953-8984

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Abstract

The Ni(110)c(2 x 2)-Sn surface phase has been investigated by the combination of quantitative low energy electron diffraction (LEED) with the aid of tensor LEED multiple scattering simulations, and medium energy ion scattering using 100 keV H+ incident ions. The structure is found to involve substitution of half of the outermost Ni atoms of the clean surface by SIT atoms, but the resulting single layer NiSn alloy is corrugated, with the Sn atoms being 0.40 +/- 0.03 Angstrom higher above the underlying Ni substrate than the outermost Ni atoms. The results are discussed in the context of previous structural studies of similar surface alloy phases; a weak trend for the amplitude of the corrugation in Ni/Sn surface alloys to become smaller as the surface layer packing density reduces may be consistent with previous ideas of the role of the depletion of valence electron density in the surface layer and the associated surface tensile stress.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics
Journal or Publication Title:	JOURNAL OF PHYSICS-CONDENSED MATTER
Publisher:	IOP PUBLISHING LTD
ISSN:	0953-8984
Date:	4 February 2002
Volume:	14
Number:	4
Number of Pages:	9
Page Range:	pp. 665-673
Publication Status:	Published
URI:	http://wrap.warwick.ac.uk/id/eprint/11194

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