1. Spin-resolved photoemission studies of epitaxial Fe3O4(100) thin films
- Author
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Chun Fu Chang, A. D. Rata, C. T. Chen, W. P. Wu, Jiunn Chen, Hong-Ji Lin, D. J. Huang, Liu Hao Tjeng, S. C. Chung, T. Hibma, and Faculty of Science and Engineering
- Subjects
Materials science ,Reflection high-energy electron diffraction ,SPECTROSCOPY ,Spin polarization ,Condensed matter physics ,VERWEY TRANSITION ,SURFACE ,half-metal ,Fermi level ,Crystal growth ,Condensed Matter Physics ,electronic structure ,magnetic thin films ,Electronic, Optical and Magnetic Materials ,symbols.namesake ,Charge ordering ,symbols ,Strongly correlated material ,MAGNETITE ,Half-metal ,Thin film ,photoemission - Abstract
In situ spin-resolved photoemission studies have been performed on expitaxial Fe 3 O 4 thin films grown on MgO(1 0 0). The spin polarization of the valence band at the Fermi level has been found to be -55.5% and not -100% as predicted by the first-principles calculations. Our spin-resolved measurements provide direct experimental evidence showing that Fe 3 O 4 is not a half-metal as a result of electron-electron correlation effects, and that Fe 3 O 4 should be considered as a strongly correlated system.
- Published
- 2002