Image deformation in field ion microscopy of faceted crystals

Image deformation in field ion microscopy of faceted crystals

We perform detailed numerical simulations of field ion microscopy images of faceted crystals and compare them with experimental observations. In contrast to the case of crystals with a smooth surface, for a faceted topography we find extreme deformations of the ion image. Local magnification is high...

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Veröffentlicht in:Ultramicroscopy 2010-02, Vol.110 (3), p.234-241
Hauptverfasser: NiewieczerzaŁ, Daniel, Oleksy, CzesŁaw, Szczepkowicz, Andrzej
Format: Artikel
Sprache:eng
Schlagworte:
Anisotropy
Computer simulation
Crystals
Deformation
Faceted surfaces
Field ion microscopy
Image contrast
Image deformation
Mathematical models
Topography
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Beschreibung
Zusammenfassung:We perform detailed numerical simulations of field ion microscopy images of faceted crystals and compare them with experimental observations. In contrast to the case of crystals with a smooth surface, for a faceted topography we find extreme deformations of the ion image. Local magnification is highly inhomogeneous and may vary by an order of magnitude: from 0.64 to 6.7. Moreover, the anisotropy of the magnification at a point located on the facet edge may reach a factor of 10.
ISSN:0304-3991
1879-2723
DOI:10.1016/j.ultramic.2009.12.001