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Scattering of Light on Small Angles in the Conditions of “Devil's Staircase” Existence within the Incommensurate Phase
Author(s) -
Sveleba S. A.,
Kapustianik V. B.,
Polovinko I. I.,
Krochuk A.,
Bublyk M.
Publication year - 1994
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.2221860124
Subject(s) - scattering , light scattering , polarization (electrochemistry) , physics , optics , ray , condensed matter physics , perturbation (astronomy) , wave vector , phase (matter) , light beam , small angle scattering , molecular physics , chemistry , quantum mechanics
Investigations of small‐angle light scattering in dependence on the temperature change rate, on the distance from the axis of the incident light beam, on the defectivity of a sample, as well as on the polarization of incident light are carried out in [N(CH 3 ) 4 ] 2 FeCl 4 crystals. It is obtained that the small‐angle light scattering in long‐periodic commensurate regions within an incommensurate phase is connected with the scattering on phasons. The appearance of additional scattering of light in the transition regions is caused by the appearance of the perturbation vector q c . Besides, the intensity I ( q ) in this region depends on the polarization of the incident light testifying the change of the incommensurability wave vector in this region.