ISSN:
1600-5724
Source:
Crystallography Journals Online : IUCR Backfile Archive 1948-2001
Topics:
Chemistry and Pharmacology
,
Geosciences
,
Physics
Notes:
Characteristic dynamical diffraction effects on high-resolution electron microscopy of perfectly and imperfectly ordered alloys are discussed using the multislice dynamical scattering theory. In contrast with short-range-ordered alloys, the scattering amplitude of the superlattice reflections of long-range-ordered alloys can be represented by a multiplication of the kinematical structure factor and the dynamical factor. It is shown that the dynamical factor does not depend on the ordered atomic arrangements, so the dynamical diffraction effect on the scattering amplitude of the superlattice reflections and also on the high-resolution superstructure images can be estimated through the dynamical factor as far as the alloy composition and the basic structure are known. The dynamical factor for Cu3Pd is calculated as a function of crystal thickness and reciprocal-lattice vector.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1107/S0108767388007408
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