Rutherford backscattering and channeling studies of Al and Mg diffusion in iron oxide thin films

Journal Article · Thu Jun 10 04:00:00 UTC 1999 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.59180· OSTI ID:21207997

Thevuthasan, S; McCready, D E; Jiang, W; McDaniel, E D; Yi, S I; Chambers, S A ^[1]

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1. Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352 (United States)

Thin films of {alpha}-Fe{sub 2}O{sub 3}(0001) (hematite) and {gamma}-Fe{sub 2}O{sub 3} (001) (maghemite) were epitaxially grown on Al{sub 2}O{sub 3}(0001) and MgO(001) substrates, respectively, using the new molecular beam epitaxy (MBE) system at the Environmental Molecular Sciences Laboratory (EMSL). We have investigated the crystalline quality of these films using Rutherford Backscattering (RBS) and channeling experiments. Minimum yields obtained from aligned and random spectra are 2.7{+-}0.3% for the {alpha}-Fe{sub 2}O{sub 3}(0001) film and 14.5{+-}0.6% for the {gamma}-Fe{sub 2}O{sub 3} (001) film. Al and Mg outdiffusion into the hematite and maghemite films were observed at higher temperatures. Indiffusion of Fe atoms from the film into the substrate was observed for the {gamma}-Fe{sub 2}O{sub 3}(001)/MgO(001) system. In contrast, no Fe indiffusion was observed for the sapphire substrate.

• OSTI ID: 21207997
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 475; ISSN 0094-243X; ISSN APCPCS
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALPHA SPECTRA
ALUMINIUM OXIDES
CHANNELING
CRYSTAL STRUCTURE
DIFFUSION
HEMATITE
IRON OXIDES
MAGNESIUM OXIDES
MOLECULAR BEAM EPITAXY
RUTHERFORD BACKSCATTERING SPECTROSCOPY
SUBSTRATES
THIN FILMS