Resonant X-Ray Scattering from the Surface of a Dilute Hg-Au Alloy

Details Resonant X-Ray Scattering from the Surface of a Dilute Hg-Au Alloy Resonant X-Ray Scattering from the Surface of a Dilute Hg-Au Alloy

2004-12-06

arxiv.org/abs/cond-mat/0412113v1

Physics

Condensed Matter

Materials Science

6 pages, 4 figures, published in Materials Science V Vol. 590

Scientific paper

We present the first resonant x-ray reflectivity measurements from a liquid surface. The surface structure of the liquid Hg-Au alloy system just beyond the solubility limit of 0.14at% Au in Hg had previously been shown to exhibit a unique surface phase characterized by a low-density surface region with a complicated temperature dependence. In this paper we present reflectivity measurements near the Au LIII edge, for 0.2at% Au in Hg at room temperature. The data are consistent with a concentration of Au in the surface region that can be no larger than about 30at%. These results rule out previous suggestions that pure Au layers segregate at the alloy surface.

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