Low energy ion scattering with the use of a neutral He<sup>0</sup> beam (NBISS) has been applied to analyze the structure of MgO(001) with Ca<sup>2+</sup> 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 Ca<sup>2+</sup> ions are substituted for the Mg<sup>2+</sup> ions at the surface and are protruding from the original MgO plane by 0.4±0.1 Å.
|ジャーナル||Journal of Vacuum Science and Technology A: Vacuum, Surfaces and Films|
|出版ステータス||Published - 1990 7月 1|
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