X-ray photoelectron diffraction study of the approximant AlCo(001) quasicrystal.
Fiche publication
Date publication
janvier 2023
Journal
Physical chemistry chemical physics : PCCP
Auteurs
Membres identifiés du Cancéropôle Est :
Pr GAUDRY Emilie
Tous les auteurs :
de Senna Junior L, Pancotti A, Kilian AS, de Siervo A, Diehl RD, de Weerd MC, Ledieu J, Gaudry E, Fournée V, Abreu GJP
Lien Pubmed
Résumé
The intermetallic AlCo is defined as a structurally complex material and is considered a low-order quasicrystalline approximant. A single crystal of AlCo(001) was obtained by the Czochralski method. The sample was characterized by X-ray photoelectron spectroscopy (XPS), low-energy electron diffraction (LEED), and X-ray photoelectron diffraction (PED). The surface composition was also analyzed by XPS, indicating only Al and Co compounds. In the current research, the crystal structure was qualitatively analyzed using the LEED patterns for different incident beam energies indicating a (1 × 1) termination, also in accordance with some literature works. The structure study was performed by applying the standard software MSCD and showed a (1 × 1) pattern. In addition, four different termination models for this termination were tested. The reliability factor indicated that the best termination belongs to the Al-rich surface layer.
Référence
Phys Chem Chem Phys. 2023 01 12;: