A RHEED study of Cu3Au (110) surface

1992 ◽  
Vol 50 (2) ◽  
pp. 1460-1461
Author(s):  
Yi Huang ◽  
John M. Cowley
Keyword(s):  
Electron Diffraction ◽  
Auger Electron Spectroscopy ◽  
Electron Spectroscopy ◽  
Auger Electron ◽  
Room Temperature ◽  
High Energy ◽  
High Energy Electron ◽  
Ion Scattering ◽  
Long Period ◽  
The Ideal

In recent years the Cu3Au (110) surface has been studied by many authors to reveal its ordering structure and order-disorder transition phenomena. A 2×1 structure which corresponds to an ideal truncation of the ordered bulk crystal and a 4×1 reconstructed structure have been observed. Using ion scattering methods, McRae et al have determined the Au fractions in the first and the second layer at room temperature, which deviate from the ideal bulk value and indicate the segregation of Au to the surface. But the question how the atoms are rearranged in the 4×1 structure and why some of the Au stays in the second layer have not been answered. Another important question about Cu3Au (110) surface is whether the long period ordering structure (LPS) exists on the surface. In present work the Cu3Au (precise composition Cu71.7Au28.3) (110) surface is studied with Auger electron Spectroscopy (AES) and Reflection High Energy Electron Diffraction (RHEED) which have not been used to study the Cu3Au surface before.

Interdiffusion During the Growth of Fe on Ag/Fe(110)

1995 ◽  
Vol 399 ◽  
Author(s):  
R. Persaud ◽  
H. Noro ◽  
J. A. Venables
Keyword(s):  
Electron Diffraction ◽  
Auger Electron Spectroscopy ◽  
Electron Spectroscopy ◽  
Auger Electron ◽  
Room Temperature ◽  
High Energy ◽  
Energy Electron ◽  
Growth Mode ◽  
High Energy Electron

ABSTRACTWe have previously shown the growth mode of Ag on Fe(110) to be Stranski-Krastanov with Ag islands growing on top of two intermediate Ag layers. In the present studies, Fe was deposited on thin annealed Ag layers on Fe(110). The growth and interdiffusion of these layers were monitored by reflection high energy electron diffraction (RHEED) and Auger electron spectroscopy (AES). For deposition at room temperature (RT), Fe islands grow in a (HO) orientation on the Ag/Fe(110) substrate. These islands form facets similar to those obtained at an equivalent coverage for the Fe/Fe(110) system. AES indicates that there is some intermixing between the deposited Fe atoms and underlying Ag layers at RT. During annealing, or for deposition at 250°C, Ag floats to the top while the Fe islands flatten to form layers at the Ag/Fe(110) interface.

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