Spin-polarized metastable deexcitation spectroscopy study of iron films |
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| Institution: | 1. Pharmaceutical Chemistry Department, Faculty of Pharmacy, King Abdulaziz University, Jeddah 21589, Saudi Arabia;2. Pharmaceutical Chemistry Department, Faculty of Pharmacy, Al-Azhar University, Nasr City 11884, Cairo, Egypt;3. Pharmacognosy and Pharmaceutical Chemistry Department, Pharmacy College, Taibah University, Al-Madinah Al-Munawarah 41477, Saudi Arabia;4. Department of Pharmaceutics and Pharmaceutical Technology, College of Pharmacy, Taibah University, Al-Madinah Al-Munawarah 344, Saudi Arabia;5. Department of Microbiology, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt;6. Clinical and Hospital Pharmacy Department, Taibah University, College of Pharmacy, Taibah University, Al-Madinah Al-Munawarah 41477, Saudi Arabia;7. Medicinal Chemistry Department, Faculty of Pharmacy, Assiut University, Assiut 71526, Egypt;8. Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Al-Azhar University, Nasr City 11884, Cairo, Egypt;1. The Key Laboratory of Advanced Materials, School of Materials Science and Engineering, Collaborative Innovation Center of Advanced Nuclear Energy Technology, Tsinghua University, Beijing 100084, China;2. School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China;3. Department of Mechanical Systems Engineering, Faculty of Engineering, Hiroshima Institute of Technology, 2-1-1 Miyake, Saeki-ku, Hiroshima 731-5193, Japan;1. Institut für Physik, Johannes Gutenberg-Universität, 55128 Mainz, Germany;2. MAX IV Laboratory, Ole Römers vag 1, 22363 Lund, Sweden;1. Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, 06120 Halle, Germany;2. Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, 06099 Halle, Germany;1. Marine College, Shandong University, Weihai 264209, China;2. Molecular Design and Synthesis, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Heverlee, Belgium;3. Zhong Yuan Academy of Biological Medicine, Liaocheng People’s Hospital/Affiliated Liaocheng Hospital, Taishan Medical University, Liaocheng, China;4. School of Marine Science and Technology, Harbin Institute of Technology at Weihai, Weihai 264209, China;1. Laboratoire de Physique Appliquée, Faculté des Sciences, B.P. 1171, 3000 Sfax, Université de Sfax , Tunisia;2. I3N and Physics Department, University of Aveiro, 3810-193 Aveiro, Portugal |
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| Abstract: | A spin-polarized metastable deexcitation spectroscopy apparatus using a nozzle-skimmer pulsed discharge metastable atom source was developed. The oxygen adsorption dependence of the surface magnetism of thin iron films deposited on MgO(100) was investigated using this apparatus. The surface local density of states spilling towards the vacuum (SDOS) at around the Fermi energy, EF, for the clean surface shows a negative polarization to the bulk. The oxygen derived SDOS for the lightly oxygen adsorbed surfaces (2–10 L) also shows a negative polarization while the SDOS at EF changes its polarity to positive. The polarization of SDOS is not detected for the heavily oxidized surfaces (20–100 L). |
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