Oxygen on Fe(1 1 0): magnetic properties of the adsorbate system |
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| Institution: | 1. CNRS, ICMCB, UPR 9048, F-33600 Pessac, France;2. Univ. Bordeaux, ICMCB, UPR 9048, F-33600 Pessac, France;3. Instituto de Tecnología Químíca (UPV-CSIC), Universitat Politècnica de València, Consejo Superior de Investigaciones Científícas, 46022 Valencia, Spain;1. KAUST Catalysis Center (KCC), Physical Sciences and Engineering Division (PSE), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia;2. Department of Chemistry, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia;3. School of Studies in Chemistry, Pt. Ravishankar Shukla University, Raipur, Chhattisgarh 492010, India;1. State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, China;2. Institute for Clean Energy & Advanced Materials, Southwest University, Chongqing 400715, China |
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| Abstract: | Investigations concerning the electronic and magnetic properties of oxygen adsorbed on magnetized iron films were carried out by means of angle and spin resolving photoelectron spectroscopy. Iron(1 1 0), epitaxially grown on a W(1 1 0) crystal, served as the ferromagnetic substrate. Exchange splittings of the O 2px derived level were detected demonstrating a magnetic coupling between the chemisorbate and the iron layer. This observation indicates the presence of an induced magnetic moment within the adsorbate overlayer. Variations of the exchange splitting occurred as a function of the oxygen coverage, energy of the exciting radiation, and detection angle of the emitted photoelectrons pointing to a k6-dependent exchange splitting. High oxygen exposures lead to a FeO overlayer at the surface, showing vanishing peak separations due to the antiferromagnetic behavior of iron oxide. |
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