Segregation of Ca ions at the MgO(001) surface studied by neutral beam incidence ion scattering spectroscopy

R. Souda, T. Aizawa, Y. Ishizawa, C. Oshima

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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.

Original languageEnglish
Pages (from-to)3218-3223
Number of pages6
JournalJournal of Vacuum Science and Technology A: Vacuum, Surfaces and Films
Issue number4
Publication statusPublished - 1990 Jul 1



  • Atomic beams
  • Calcium ions
  • Crystal structure
  • Impurities
  • Ion scattering analysis
  • Magnesium oxides
  • MgO:Ca
  • Segregation
  • Surface properties

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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