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1995 | 87 | 3 | 619-630
Article title

Composition of a Clean and Sulphur Covered CuNi(100) Single Crystal Surface

Content
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Languages of publication
EN
Abstracts
EN
Surface composition of the CuNi(100) single crystal in the temperature range of 893÷1073 K (620÷800°C) has been investigated using low energy electron diffraction and Auger electron spectroscopy methods. A clean sam­ple surface at moderate temperatures reveals small surface copper enrich­ment, with respect to the bulk Cu-rich composition. For example, at 1006 K (733°C) the copper surface concentration C^{s}_{Cu}, was determined from the quantitative Auger electron spectroscopy analysis as 0.91. After prolonged heating at higher temperatures, the copper surface concentration converges to the bulk value, i.e. at 1073 K (800°C), C^{s}_{Cu} = C^{b}_{Cu} = 0.87. Surface seg­regation of sulphur proceeds from (1 × 1) through p(2 × 2)S/CuNi(100) to c(2 × 2)S/CuNi(100) structures of low energy electron diffraction. In the presence of segregated sulphur the surface concentration of copper is lower.
Keywords
EN
Publisher

Year
Volume
87
Issue
3
Pages
619-630
Physical description
Dates
published
1995-03
received
1994-07-05
(unknown)
1994-09-13
(unknown)
1994-12-28
Contributors
author
  • Laboratoire de Physico-Chimie des Surfaces, CNRS (URA 425), Université Paris VI, ENSCP, 11, Rue Pierre et Marie Curie, 75231 Paris Cedex 05, France
author
  • Laboratoire de Physico-Chimie des Surfaces, CNRS (URA 425), Université Paris VI, ENSCP, 11, Rue Pierre et Marie Curie, 75231 Paris Cedex 05, France
References
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Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv87z306kz
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