Adsorption of cobalt on the ten-fold surface of d-Al72Ni11Co17 and on the five-fold surface of i-Al70Pd21Mn9
Résumé
The adsorption behaviour of Co on the ten-fold surface of d-Al72Ni11Co17 and on the five-fold surface of i-Al70Pd21Mn9 has been studied using scanning tunneling microscopy (STM), Auger electron spectroscopy (AES) and low-energy electron diffraction (LEED). The analysis of a distinctive quasiperiodic LEED pattern for coverages from 3 - 30 ML of Co on d-Al72Ni11Co17 suggests that the Co forms in a pseudomorphic row structure composed of domains of Fibonacci spaced rows having a periodic lattice parameter along the rows of 2.5 ± 0.1 Å. The same structure, though less well-ordered and with a larger lattice parameter, is formed on the five-fold surface of i-Al70Pd21Mn9.
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