- Tytuł:
- Composition of a Clean and Sulphur Covered CuNi(100) Single Crystal Surface
- Autorzy:
-
Godowski, P. J.
Marcus, P. - Powiązania:
- https://bibliotekanauki.pl/articles/1932121.pdf
- Data publikacji:
- 1995-03
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
82.80.Pv
61.14.Hg
68.35.Dv - Opis:
- 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$\text{}_{Cu}^{s}$, 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$\text{}_{Cu}^{s}$ = C$\text{}_{Cu}^{b}$ = 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.
- Źródło:
-
Acta Physica Polonica A; 1995, 87, 3; 619-630
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł