Electronic structures of [alpha]-Fe[sub 2]O[sub 3] and Fe[sub 3]O[sub 4] from O [ital K]-edge absorption and emission spectroscopy

Journal Article · Thu Jul 15 04:00:00 EDT 1993 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.48.2109· OSTI ID:6461600

Ma, Y ^[1]; Johnson, P D ^[2]; Wassdahl, N; Guo, J; Skytt, P; Nordgren, J ^[3]; Kevan, S D ^[4]; Rubensson, J; Boeske, T; Eberhardt, W ^[5]

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1. Physics Department, University of Washington, Seattle, Washington 98195 (United States)
2. Physics Department, Brookhaven National Laboratory, Upton, New York 11973 (United States)
3. Physics Department, Uppsala University, Uppsala (Sweden)
4. Physics Department, University of Oregon, Eugene, Oregon 97403 (United States)
5. Institut fuer Festkoerperforschung der Kernforschungsanlage Juelich G.m.b.H., Postfach 1913, D-5170 Juelich (Germany)

We present O [ital K]-edge absorption and emission spectra for [alpha]-Fe[sub 2]O[sub 3] and Fe[sub 3]O[sub 4] obtained using a high-resolution-undulator soft-x-ray radiation source. The occupied and the unoccupied O [ital p] densities of states are obtained and compared with the valence-band photoemission results. While these results confirm that [alpha]-Fe[sub 2]O[sub 3] can be classified as a charge transfer or an intermediate-type insulator, they suggest that Fe[sub 3]O[sub 4] is more likely of the Mott-Hubbard type. The excitation-energy dependence of the emission spectra is also discussed.

• DOE Contract Number: AC02-76CH00016
• OSTI ID: 6461600
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 48:4; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ABSORPTION SPECTRA
CHALCOGENIDES
CHARGE EXCHANGE
CLUSTER EXPANSION
ELECTROMAGNETIC RADIATION
ELECTRONIC STRUCTURE
EMISSION
EMISSION SPECTRA
ENERGY LEVELS
ENERGY-LEVEL DENSITY
IONIZING RADIATIONS
IRON COMPOUNDS
IRON OXIDES
OXIDES
OXYGEN COMPOUNDS
P STATES
PHOTOEMISSION
RADIATIONS
SECONDARY EMISSION
SERIES EXPANSION
SOFT X RADIATION
SPECTRA
TRANSITION ELEMENT COMPOUNDS
X RADIATION