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Valence Band Electronic Structure of Cleaved Iron Oxide Single Crystals Studied by Resonant Photoemission

Published online by Cambridge University Press:  21 February 2011

Robert J. Lad  and
Victor E. Henrich
Robert J. Lad
Affiliation:
Applied Physics, Yale University, 15 Prospect Street, New Haven, CT 06520
Victor E. Henrich
Affiliation:
Applied Physics, Yale University, 15 Prospect Street, New Haven, CT 06520
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Abstract

Synchrotron radiation has been used to perform resonant photoemission measurements across the 3p→3d photoabsorption threshold from cleaved FexO (x ≃0.945), Fe3O4, and α-Fe2O3 single crystal surfaces. The resonant enhancement of the Fe 3d photoelectrons allows the Fe 3d-derived final states in the valence band to be distinguished from the overlapping O 2p states. Using well-characterized single crystals, the distributions of Fe 3d-derived states associated with the ferrous (Fe2+) and ferric (Fe3+) cations have been identified. The Fe 3d-derived states are found to extend about 18 eV below the Fermi level in each oxide, which can be attributed to a significant amount of hybridization between the Fe 3d and O 2p orbitals.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 143: Symposium V – Synchrotron Radiation in Materials Research , 1988 , 73
Copyright
Copyright © Materials Research Society 1989

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