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A method for the recovery of local order coefficients from two‐dimensional intensity data for binary f.c.c. alloys
Author(s) -
Epperson J. E.,
Fürnrohr P.
Publication year - 1975
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889875009764
Subject(s) - reciprocal lattice , reciprocal , binary number , intensity (physics) , scattering , diffraction , range (aeronautics) , plane (geometry) , constant (computer programming) , space (punctuation) , order (exchange) , computational physics , optics , materials science , physics , mathematics , computer science , geometry , economics , philosophy , linguistics , arithmetic , finance , composite material , programming language , operating system
A method is derived which permits the Cowley–Warren order parameters to be recovered from diffuse scattering measurements made in one plane in reciprocal space for systems with only short‐range correlations. The procedure is demonstrated first by application to some at‐temperature measurements on Cu 3 Au and then by considering some simulated diffraction profiles, with and without controlled errors. From the simulated scattering without error, an empirical rule is developed which allows one to decide if a given profile is amenable to this recovery method. By simulation of data with varying constant‐background contributions, it is shown that such an error can be recognized and corrected.