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Lattice Phonon Spectra of Aluminum Oxide Anodic Films

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Abstract:

Techniques have been developed for obtaining reproducible lattice phonon spectra of barrier aluminum oxide anodic films. Changes in the lattice phonon spectrum as a result of 15-keV proton bombardment are interpreted in terms of the formation of Al-OH bonds. Polarization spectra of stripped and unstripped aluminum oxide films confirm the findings of Vedder and Vermilyea, particularly with respect to the origin of the 960 cm−1 band. The close similarity in the observed and calculated band shapes (using the theory of Berreman) leave little doubt that the 960 cm−1 absorption is due to a longitudinal optic mode of the aluminum oxide lattice.

Keywords: Infrared, spectra; Reflectance, spectroscopy; Thin films

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/000370275774455329

Affiliations: 1: Chemistry Division, Argonne National Laboratory, Argonne, Illinois 60439; visiting Scientist, French Atomic Energy Commission, Saclay, France 2: Chemistry Division, Argonne National Laboratory, Argonne, Illinois 60439; present address: Department of Physics, Wheaton College, Wheaton, Ill. 3: Chemistry Division, Argonne National Laboratory, Argonne, Illinois 60439

Publication date: March 1, 1975

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