Vibrational Spectroscopy of Ordered Oxygen Adlayers on Ni/Cu(001) and Co/Cu(001) Thin Film Systems
Abstract
We report surface vibrations in c(2x2) oxygen adlayers on Ni and Co thin films on a Cu (001) substrate measured at gamma by high resolution EELS. For the Ni thin film surface, one phonon peak is measured for varying film thickness from 1.3 ML (monolayer) to 6 ML with a constant energy of 221cm -1. For the CO thin film surface, three loss peaks are found, whose relative intensities change as the film thicknesses are varied. One loss peak ca. 520 cm -1 is tentatively assigned to the Fuchs-Kliewer mode of cobalt oxide (CoO). The other two peaks at 317 cm -1 and 376 cm -1 are likely related to different bonding sites. Surface phonons on the p(2 x2) Co thin film (389 cm -1) and a bulk resonance mode (115 cm -1) are also reported.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 15, 1991
- Accession Number
- ADA235921
Entities
People
- J. Kim
- L. L. Kesmodel
- M. H. Mohamed
Organizations
- Indiana University Bloomington