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Electron Microscopic Study of Long Period Modulated Structures with Continuously Variable Periodicity

Published online by Cambridge University Press:  21 February 2011

D. Colaitis ,
Van Dyck ,
C. Conde-Amiano  and
S. Amelinckx
D. Colaitis
Affiliation:
ER 210 CNRS, 1. Pl. A. Briand F-92190 Meudon, France;
Van Dyck
Affiliation:
RUCA, Groenenborgerlaan 171, B-2020 Antwerpen, Belgium;
C. Conde-Amiano
Affiliation:
Departemento de Optica, Facultad de Fisica, E-Sevilla, Espana;
S. Amelinckx
Affiliation:
RUCA, Groenenborgerlaan 171, B-2020 Antwerpen, Belgium; Also at SCK/CEN, B-2400 Mol, Belgium.
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Abstract

Some systems show continuous and reversible phase transitions which are characterised by the appearance of irrational sunerlattice reflections with a position that shifts continuously and reversibly with temperature. This diffraction feature is not necessarily caused by a deformation modulation but can also originate from the reneated occurrence of planar defects with a variable “average” periodicity. The planar defects can be of different type (e.g. planes of different composition, antiphase boundaries, twin planes) as shown for the systems Ni3+xTe2, Cu3−xTe2, Cu2−S, mPbS-nBi2S3 ( > 2) and Cu 0.75VS2, using electron-microscopy and electron diffraction.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 21: Symposium GREECE – Phase Transformations in Solids , 1983 , 219
Copyright
Copyright © Materials Research Society 1984

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References

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