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Investigation of the fivefold icosahedral AlPdMn surface by photoemission and Auger electron spectroscopy
Author(s) -
Dubot Pierre,
Cénédése Pierre,
Lorang Gérard
Publication year - 2000
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/1096-9918(200008)30:1<346::aid-sia785>3.0.co;2-0
Subject(s) - auger electron spectroscopy , auger , x ray photoelectron spectroscopy , auger effect , icosahedral symmetry , photoemission spectroscopy , quasicrystal , electronic structure , electron spectroscopy , materials science , angle resolved photoemission spectroscopy , inverse photoemission spectroscopy , valence electron , electron , atomic physics , core electron , chemistry , condensed matter physics , crystallography , nuclear magnetic resonance , physics , quantum mechanics , nuclear physics
Surface composition and electronic structure of AlPdMn quasicrystalline alloy have been studied for temperature ranging from 300 K to 873 K. The quasicrystalline nature of the in‐situ prepared surface was identified by the unusual behaviour of the core level photoemission peaks of Mn as already demonstrated by Thiel et al. Quantitative estimation of surface concentration by measuring the peak on background ratio in Auger electron spectroscopy (AES) do not allow to concluded to surface segregation of one element whatever the substrate temperature. Auger transitions implying valence band electrons in the Auger relaxation reveal interesting shapes and energies modifications that can be correlated with the typical electronic structure of this alloy. The appearance of strong satellite structure in the Auger and photoemission spectrum can be attributed to bulk plasmon of the quasicrystalline phase. Copyright © 2000 John Wiley & Sons, Ltd.