Leed measurements of Fe epitaxially grown on Cu(100) |
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| Affiliation: | 1. Department of Materials Science and Engineering and State Key Laboratory of Marine Pollution, City University of Hong Kong, Hong Kong, China;2. College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China;3. Shenzhen Geim Graphene Center, Tsinghua-Berkeley Shenzhen Institute & Institute of Materials Research, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China;4. Shenzhen Research Institute, City University of Hong Kong, Shenzhen 518057, China;1. Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Denmark;2. Center for Atomic-scale Materials Design, Department of Physics, Technical University of Denmark, Denmark;3. Department of Chemistry, Copenhagen University, Denmark;4. Haldor Topsøe A/S, Kgs. Lyngby, Denmark;1. School of Chemical Engineering and Technology, Xi’an Jiaotong University, Xi’an, 710049, China;2. Center for Applied Chemical Research, Frontier Institute of Science, Xi’an Jiaotong University, Xi’an, 710049, China;1. National Center for Materials Service Safety, University of Science and Technology Beijing, Beijing, 100083, China;2. KTH Royal Institute of Technology, Division of Surface and Corrosion Science, School of Chemical Science and Engineering, SE 10044, Stockholm, Sweden |
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| Abstract: | Iron was epitaxially grown on a Cu(100) surface. Low energy electron diffraction (LEED) intensity versus energy curves were recorded for 1 and 10 layers of iron on Cu(100) at room temperature. A full dynamical analysis was performed using the renormalized forward scattering perturbation method. The surface Debye temperatures were determined to be 233 K for 1 ML Fe and 380 K for 10 layers of Fe. The value obtained for fcc iron was 550 K. A multiple relaxation approach was employed in analyzing the experimental data. The estimated interlayer spacings for the first and second layers were 1.78±0.02 Å (first) and 1.81±0.02 Å (second) for 1 ML Fe, and 1.81±0.02 Å (first) and 1.78±0.02 Å (second) for 10 layers of Fe on Cu(100). Auger electron spectroscopy was used to determine the thickness of the Fe films, and the LEED measurements indicate approximately a layer-by-layer growth until about 17 layers at room temperature. At higher temperatures there is evidence of iron diffusion or copper surface segregation. |
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