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Short-range ordering of Cu3Au above Tc in the topmost 80 A of a (001) face

Published online by Cambridge University Press:  31 January 2011

M. Kimura ,
J. B. Cohen ,
S. Chandavarkar  and
K. Liang
M. Kimura
Affiliation:
Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208
J. B. Cohen
Affiliation:
Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208
S. Chandavarkar
Affiliation:
Department of Physics, University of Tennessee, Knoxville, Tennessee 37966
K. Liang
Affiliation:
Exxon Corporate Research Laboratory, Annandale, New Jersey 08801
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Abstract

The short-range order in the near surface region of the Cu3Au(001) face was investigated above the critical temperature by glancing-incidence x-ray diffraction, measuring the diffuse intensity throughout a two-dimensional region of reciprocal space. This intensity was analyzed quantitatively to obtain the two-dimensional Cowley–Warren short-range-order parameters and atomic displacements. Monte-Carlo simulation based on these values has revealed that the atomic configurations in the surface consist of ordered domains and clusters in a disordered matrix. There is a large number of {10} antiphase domain boundaries (APDB).

Type
Articles
Information
Journal of Materials Research , Volume 12 , Issue 1 , January 1997 , pp. 75 - 82
Copyright
Copyright © Materials Research Society 1997

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