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Al-rich Fe0.85 Al0.15 (100), (110) and (111) surface structures

Abstract : Based on previous photoemission findings, the influence of newly observed aluminum surface segregation at the low (110), (100) and (111) index surfaces of the A 2 body-centered Fe 0.85 Al 0.15 random alloy is explored. Scanning Tun-neling Microscopy, Low-Energy Electron Diffraction and Grazing-Incidence X-Ray Diffraction are combined to explore surface structures and topogra-phies. The formation of a surface composition close to the B 2 Fe 0.5 Al 0.5 occurs with the appearance of (i) a long-range pseudo-hexagonal incommen-surate superstructure with a periodicity of ∼ 18Å on the (110) surface, (ii) a (1 × 1) termination on the (100) surface and (iii) a intense vicinal faceting of the (111) surface in the form of triangular pits.
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https://hal.archives-ouvertes.fr/hal-02451294
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Submitted on : Monday, January 27, 2020 - 9:48:47 AM
Last modification on : Sunday, June 6, 2021 - 2:56:01 PM
Long-term archiving on: : Tuesday, April 28, 2020 - 2:36:55 PM

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Zongbei Dai, Natalia Alyabyeva, Patrizia Borghetti, Stéphane Chenot, Pascal David, et al.. Al-rich Fe0.85 Al0.15 (100), (110) and (111) surface structures. Applied Surface Science, Elsevier, 2020, 509, pp.145312. ⟨10.1016/j.apsusc.2020.145312⟩. ⟨hal-02451294⟩

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