The technique of reflection electron energy-loss spectroscopy (REELS) in the electron microscope is applied to the study of oxygen-annealed (100) surfaces of MgO. It is shown that REELS can detect the Ca layer that forms on the surface during annealing. High-spatial-resolution surface analysis indicates that Ca preferentially segregates to surface steps and is associated with decoration material at the steps, which has been reported in earlier studies. The presence of a Ca marker layer on the annealed MgO surface provides a suitable test sample for investigating the influence of surface resonance diffracting conditions on the reflection spectra.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics