Direct observation of the rippling and the order-disorder transition at the Cu3Au(100) surface by TOF-ion scattering
(1996) Surface Science — Vol. 352, p. 978-982 (1996)
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- Abstract
- Low energy ion scattering provides a direct measurement of surface rippling at room temperature, i.e. a relaxation of Au atoms 0.12 Angstrom above the Cu atoms in the outermost layer, which is unambiguously terminated by a mixed and ordered CuAu layer. It is shown that the technique, which is sensitive to the locations of atoms at the first monolayer, is also sensitive to the order-disorder transition in this layer. The occurrence of disorder modifies the arrangement of the atomic rows and then changes the double scattering conditions for low incident angles. As a result, the Au signal decreases significantly at the transition temperature. This effect is continuous and starts at about 50 degrees C below the bulk transition temperature (663 K).
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Citations
Houssiau, L., & Bertrand, P. (1996). Direct observation of the rippling and the order-disorder transition at the Cu3Au(100) surface by TOF-ion scattering. Surface Science, 352, 978-982. https://doi.org/10.1016/0039-6028(95)01311-3 (Original work published 1996)