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Stress distribution and lattice curvature determinations in multilayer structures by simulation of X‐ray rocking curves
Author(s) -
Cembali F.,
Servidori M.
Publication year - 1989
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/s0021889889003900
Subject(s) - curvature , perpendicular , optics , coherence (philosophical gambling strategy) , materials science , physics , geometry , mathematics , quantum mechanics
A mechanical model is presented for the calculation of the stress depth distribution and the curvature radius in multilayer crystalline structures. The model is compatible with the perpendicular strain and thickness determined for each lamella by simulation of a double‐crystal X‐ray rocking curve, and is suitable for coherence at all the interfaces as well as for coherence loss at one interface. An example of an application to a hypothetical practical case shows that the comparison between experimental and calculated curvatures and asymmetric rocking curves allows one to determine if loss of coherence occurred at an interface as a consequence of sample processing, and to determine the amount of incoherence and the depth position of the incoherent interface.