Segregation of Ca ions at the MgO(001) surface studied by neutral beam incidence ion scattering spectroscopy
- 1 July 1990
- journal article
- Published by American Vacuum Society in Journal of Vacuum Science & Technology A
- Vol. 8 (4) , 3218-3223
- https://doi.org/10.1116/1.576566
Abstract
Low energy ion scattering with the use of a neutral He0 beam (NBISS) has been applied to analyze the structure of MgO(001) with Ca2+ impurities segregated from the bulk. The NBISS technique successfully avoids specimen charging, which is a common obstacle to analyzing the insulating surface by using ordinary ion scattering techniques. It is found that the segregated Ca2+ ions are substituted for the Mg2+ ions at the surface and are protruding from the original MgO plane by 0.4±0.1 Å.Keywords
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