Forbidden-reflection lattice imaging for the determination of kink densities on partial dislocations

1 May 1986

journal article
research article
Published by Taylor & Francis in Philosophical Magazine A

Vol. 53 (5) , 627-643
https://doi.org/10.1080/01418618608242861

Abstract

High-resolution electron microscope lattice images have been obtained at the Schemer focus setting for the first time from the ′forbidden′ {422}/3 Bragg reflections which result from intrinsic stacking faults (lying normal to the beam) in thin crystals of silicon. Microdiffraction patterns have also been obtained from stacking faults normal to the beam, showing these reflections. The boundaries of the SF lattice image delineate the approximate location of partial dislocation cores running normal to the beam, and these reveal a high density of directional fluctuations, despite their appearance as straight dislocations in the corresponding weak-beam images, The effects of surface roughness on an atomic scale are discussed, and this is shown to limit the accuracy with which the partial dislocation cores can be located to within a few ángstroms.

Keywords

This publication has 15 references indexed in Scilit:

Resolution of atomic steps on dislocations in rutile
Philosophical Magazine A, 1984
Line defects in silicon: The 90° partial dislocation
Physical Review B, 1984
Photoplastic effect in silicon
Physica B+C, 1983
Dark-field electron microscopy of dissociated dislocations and surface steps in silicon using forbidden reflections
Philosophical Magazine A, 1983
On the Core Structure of the Glide‐Set 90° and 30° Partial Dislocations in Silicon
Physica Status Solidi (b), 1980
Approximations for dynamical calculations of microdiffraction patterns and images of defects
Acta Crystallographica Section A, 1978
On the mobility of partial dislocations in silicon
Philosophical Magazine, 1977
Electronic effects on dislocation velocities in heavily doped silicon
Physical Review B, 1976
Out-of-zone effects in dynamic electron diffraction intensities from gold
Acta Crystallographica Section A, 1971
The analog computation of dynamic electron diffraction intensities
Acta Crystallographica Section A, 1968