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Spin-resolved photoemission study of in situ grown epitaxial Fe layers on W(110)
Affiliation:1. Atomic & Molecular Physics Division, Bhabha Atomic Research Centre, Mumbai, 400 085, India;2. Homi Bhabha National Institute, Mumbai, 400 094, India;3. Technical Physics Division, Bhabha Atomic Research Centre, Mumbai, 400 085, India;4. UGC-DAE Consortium for Scientific Research, Mumbai Centre, Mumbai, 400 085, India;5. Synchrotron Utilisation Section, Raja Ramanna Centre for Advanced Technology, Indore, 752013, India;6. Materials Science Division, Bhabha Atomic Research Centre, Mumbai, 400 085, India;1. Department of Mechanical Engineering, The University of Sheffield, UK;2. School of Mechanical, Aerospace and Civil Engineering, The University of Manchester, UK;3. Element Six, Harwell Campus, Fermi Ave, Didcot, OX11 0QR UK;1. Functional Materials Laboratory, School of Materials & Mineral Resources, Xi’an University of Architecture and Technology, China;2. Shenyang National Laboratory for Material Science, Institute of Metal Research, Chinese Academy of Sciences, China;3. Departamento de Física and Centre of Innovation in Engineering and Industrial Technology, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Portugal;4. Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, China;5. TEMA, Department of Mechanical Engineering, University of Aveiro, Portugal;6. CEFITEC, Universidade Nova de Lisboa/Departamento de Física, Universidade de Évora, Portugal;1. Extreme Materials Initiative, Geophysical Laboratory, Carnegie Institution for Science, Washington, DC 20015, USA;2. Department of Physics and Astronomy, West Virginia University, Morgantown, WV 26506, USA;3. Department of Physics and Astronomy, National Institute of Technology, Rourkela, 769008, India;4. National Physical Laboratory (CSIR), Delhi, 110012, India;5. Department of Physics and Institute of Functional Nanomaterials, University of Puerto Rico, San Juan, PR 00936, USA;6. Department of Earth and Environmental Sciences, Ludwig Maximilians University, Munich 80333, Germany;1. IMDEA Materials Institute, C/Eric Kandel 2, 28906 Getafe, Madrid, Spain;2. Department of Materials Science, Polytechnic University of Madrid, E. T. S. de Ingenieros de Caminos, 28040 Madrid, Spain;1. Department of Experimental Neurology, NeuroCure Clinical Research Center, and Department of Neurology, Charité–University Medicine Berlin, Berlin, 10117, Germany;2. Department of Rheumatology and Clinical Immunology, Charité–University Medicine Berlin, Berlin, 10117, Germany;3. Department of Psychiatry and Neuropsychology, School for Mental Health and Neuroscience, Maastricht University, Maastricht, Netherlands
Abstract:Spin- and angle-resolved photoemission spectroscopy of in situ grown epitaxial Fe layers on W(110) shows bulk-like behavior for more than two atomic Fe layers. For about ten and more atomic layers of Fe we find a spin polarization to be about -100% near the Fermi energy and +80 % between 1 eV and 3 eV binding energy. For the bilayer of Fe drastic changes in the spin-resolved spectra and a 20 % enhancement of the spin polarization compared to the bulk value are observed. The monolayer of Fe is ferromagnetically ordered with a spin polarization reduced by about 50%. A switching of the easy magnetization axis from [001] to [11̄0] is observed in the spin polarization with decreasing Fe layer thickness near d = (65±5) Å.
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