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 ∼ 18A 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.

中文翻译：

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富铝 Fe0.85Al0.15(100)、(110) 和 (111) 表面结构

基于先前的光电发射发现，探索了在 A 2 体心 Fe 0.85 Al 0.15 无规合金的低 (110)、(100) 和 (111) 指数表面处新观察到的铝表面偏析的影响。扫描隧道显微镜、低能电子衍射和掠入射 X 射线衍射相结合，以探索表面结构和地形。接近 B 2 Fe 0.5 Al 0.5 的表面成分的形成伴随着 (i) 在 (110) 表面上出现周期性约为 18A 的长程伪六边形不相称超结构，(ii) （1×1）终止于（100）表面和（iii）三角形凹坑形式的（111）表面的强烈邻面。