Hostname: page-component-78c5997874-s2hrs Total loading time: 0 Render date: 2024-11-09T05:58:27.251Z Has data issue: false hasContentIssue false
  • English
  • Français

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.
Get access

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

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. Gangulee, A. and Moss, S. C., “Long Range Order in Ag3Mg”, to be published in Jl. Appl. Cryst., 1, 1968.Google Scholar
2. Glossop, A. B. and Pashley, D. W., “The Direct Observation of Antiphase Domain Boundaries in Ordered Copper-Gold (CuAu) Alloy”, Proc. Roy. Soc. (London), A250: 132–146, 1959.Google Scholar
3. Wilson, A. J. C., “The reflexion of X-rays from the ‘anti-phase nuclei’ of AuCu3”, Proc. Roy. Soc. (London), A181: 360–368, 1943.Google Scholar
4. Gangulee, A. and Bever, M. B., “The Silver-rich Solid Solutions in the System Silver-Magnesium:I Short-Range Order”, Trans. Met. Soc. AIME, 242:272–277, 1968.Google Scholar
5. Taylor, A., “X-ray Metallography”, pp. 685–694, John Wiley and Sons, New York, 1961.Google Scholar
6. Jones, F. W., “The Measurement of Particle Size by X-ray Methods”, Proc. Roy. Soc. (London), A166:16–43, 1938.Google Scholar