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Antiphase Domains in Long-Period Superlattices

Published online by Cambridge University Press:  06 March 2019

P. Chaudhari  and
A. Gangulee
P. Chaudhari
Affiliation:
IBM Watson Research Center, Yorktown Hts., N. Y.
A. Gangulee
Affiliation:
IBM Components Division, Hopewell Junction, N. Y.
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Abstract

The antiphase boundary in a superlattice has been defined as the boundary between two neighboring zones which are out ofsphase with each other. This difference in phase is usually represented by a translation vector. In long-period superlattices, however, antiphase boundaries of the above mentioned type occur with regular spacings, thereby introducing another element of order which shows up as satellite peaks in the diffraction pattern. A second kind of antiphase boundaries may be defined in a one-dimensional long-period superlattice as the boundary between two neighboring zones which have different directions of repetition of the antiphase boundaries of the first kind. A theory of X-ray diffraction to obtain the size of the domains of the second kind in a one-dimensional long-period superlattice has been developed. An application of this theory to the ordered alloy Ag3Mg, known to have a one-dimensional long-period superlattice, is described and the results of the X-ray measurements are compared with those obtained by transmission electron microscopy.

Type
Research Article
Information
Advances in X-Ray Analysis , Volume 12: Seventeenth Annual Conference on Applications of X-ray Analysis, August 21-23, 1968 , 1968 , pp. 129 - 138
Copyright
Copyright © International Centre for Diffraction Data 1968

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References

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