Comparison of the properties of electron microscope images from dislocations and rows of tetragonal point defects

Lepski, D.; Michael, R.

doi:10.1002/pssa.2210360151

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1981

1982

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Effects of a cloud of impurity atoms near a dislocation on electron microscopic contrast

Gaidukov¹,

Maksimov²,

Филиппов³

1981

Phys. Stat. Sol. (a)

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A model is proposed for the impurity‐atom cloud formed near an edge dislocation lying parallel to the surface taking into account the basic physical features of the real cloud. On the basis of the regularities obtained for the distribution of the displacement fields of the present model the eatures of the electron‐microscopy images are studied theoretically for a dislocation with a cloud. The presence of the cloud leads to a decrease of the edge intensity of the dislocation image independent of its bedding depth and to a change of the contrast sign at some depths. The diffraction conditions are found where these effects are mostly marked.

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