Quenching of exchange splitting in face centred cubic Fe observed by angle resolved photoemission |
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| Institution: | 1. Department of Physics and Astronomy and Quantum Science and Engineering Center, George Mason University – Fairfax, VA, USA;2. Department of Physics, University of Texas El Paso, El Paso, Texas, USA;1. M.N. Miheev Institute of Metal Physics of Ural Branch of Russian Academy of Sciences, Kovalevskaya str. 18, 620108, Ekaterinburg, Russia;2. Institute of Natural Sciences and Mathematics, Ural Federal University, Mira str. 19, Ekaterinburg, Russia;3. Institut Laue-Langevin, 71 Avenue des Martyrs, CS 20156, 38042, Grenoble Cedex 9, France;4. Hochfeld-Magnetlabor Dresden (HLD-EMFL), Helmholtz-Zentrum Dresden-Rossendorf, 01328, Dresden, Germany;1. Helmholtz Centre Potsdam – GFZ German Research Centre for Geosciences, Section 1.3: Earth System Modelling, Germany;2. Charles University in Prague, Czech Republic;3. DIAS – Dublin Institute of Advanced Studies, Ireland;4. Utrecht University, The Netherlands |
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| Abstract: | The energy bands along the (001)-direction of face centered cubic iron have been determined by means of angle resolved photoemission utilising synchrotron radiation. Bulk Fe is bcc at room temperature: the metastable fcc-phase has been obtained by thin film epitaxy on a Cu(001)-surface. In contrast to bcc Fe the bands of fcc Fe show no exchange splitting (to within the limits of our experimental resolution of 0.3 eV), indicating a loss of ferromagnetic order in the fcc phase at room temperature. An as yet unidentified feature is reported which is not consistent with the one-electron band theory. |
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