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Diffraction features due to ordered distribution of twin boundaries in orthorhombic Ni–Mn–Ga crystals
Author(s) -
Ustinov A.,
Olikhovska L.,
Glavatska N.,
Glavatskyy I.
Publication year - 2009
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/s0021889809007171
Subject(s) - orthorhombic crystal system , crystal twinning , diffraction , crystallography , materials science , condensed matter physics , reciprocal lattice , lattice (music) , rod , monte carlo method , intensity (physics) , perpendicular , geometry , molecular physics , physics , optics , chemistry , mathematics , microstructure , medicine , alternative medicine , statistics , pathology , acoustics
The diffraction intensity distributions for orthorhombic crystals containing the ordered twin boundaries of the system (110), 〈10〉 were calculated in the kinematic approach using the Monte Carlo computer simulation technique. A simple model of short‐range order in the arrangement of the twin boundaries was assumed to generate the nano‐twinned structure. Analysis of the intensity distributions showed that such a twin boundary distribution results in the formation of extra peaks along the reciprocal lattice rods that are perpendicular to the close‐packed planes. These extra peak intensities and positions are dependent on the most probable distances between the twin boundaries and on the degree of short‐range order.