Local spin polarization at surfaces probed by hollow atoms

M Unipan*, A Robin, R Morgenstern, R Hoekstra

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

16 Citations (Scopus)

Abstract

The relaxation of hollow atoms produced by slow multiply charged ions impinging on surfaces produces characteristic Auger electron spectra. These spectra, which serve as fingerprints of the interaction, can be used to probe local spin ordering at surfaces by relating changes in the intensities of different spin states to local spin polarization at the surface. The area from which the electrons are captured is of the order of a few A(2), only. The potential of the method is illustrated by He2+ and N6+ ions interacting with a ferromagnetic Ni(110) crystal. From the Auger spectra we determine a spin polarization of approximate to-90% at room temperature.

Original languageEnglish
Article number177601
Pages (from-to)177601
Number of pages4
JournalPhysical Review Letters
Volume96
Issue number17
DOIs
Publication statusPublished - 5-May-2006

Keywords

  • ELECTRON-EMISSION
  • GRAZING-INCIDENCE
  • SCATTERING
  • COLLISIONS
  • IONS
  • SPECTROSCOPY
  • MAGNETISM
  • SPECTRUM
  • NI(110)
  • CAPTURE

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