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Theory of the Power Spectrum and Scattering Properties of Three‐Dimensional Disordered Systems Having a Variable Degree of Short‐Range Order. II. Line Spectrum and Cross‐Relation Technique
Author(s) -
Celasco M.,
Mazzetti P.,
Stepanescu A.
Publication year - 1984
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221230202
Subject(s) - scattering , line (geometry) , amorphous solid , range (aeronautics) , condensed matter physics , component (thermodynamics) , neutron scattering , physics , spectral density , spectrum (functional analysis) , statistical physics , computational physics , materials science , chemistry , quantum mechanics , mathematics , crystallography , geometry , statistics , composite material
A new approach to the power spectrum calculation of the three‐directional distribution of physical events characterized by a variable degree of order, ranging from a perfect long‐range order to a complete disorder, including short‐range order properties, is given in Part I of the paper. In this second part simple analytical expressions of the line component of the power spectrum are obtained. The scattering properties of disordered or partially ordered atomic or molecular structures (like for instance, liquid crystals) are considered, concerning both, the diffuse and the line component of the spectrum. The case when in the local order different types of sublattices can still be identified is also considered. Applications of the above results include X‐ray and neutron scattering properties of disordered or partially ordered atomic or molecular structures concerning both, the line and diffuse component of spectrum, excess energy and power loss calculation in ferromagnets and superconductors, and physical properties of amorphous materials. Some of these applications will be discussed in a forthcoming paper.