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Microdiffraction from Cleaved Si-Si1-xGex Multilayers

Published online by Cambridge University Press:  28 February 2011

W. T. Pike
W. T. Pike*
Affiliation:
Cavendish Laboratory, Madingley Road, Cambridge, UK, CB2 OHE
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Abstract

Using the nanometer probe available in the dedicated scanning transmission electron microscope (STEM) local structural information can be obtained from individual layers in [100] grown Si-Si1-xGex multilayer structures. Furthermore the small probe size enables cleaved specimens with their very large wedge angles to be analyzed in cross-section. Diffraction patterns are shown from multilayers of varying periodicity. Analysis of the patterns concentrates on the higher order Laue zone (holz) reflections in the high angle excess ring . The behaviour of the excess holz reflections indicates the transition from a strained layer superiattice to a dislocated structure as the thickness of the layers increases for a given composition.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 160 , 1989 , 111
Copyright
Copyright © Materials Research Society 1990

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