MANIFESTATIONS OF INCOMMENSURATE MODULATION IN THE SPECTRAL PROPERTIES OF A(2)MECL(4) TYPE CRYSTALS

Authors
KAPUSTIANIK VB
Citation
Vb. Kapustianik, MANIFESTATIONS OF INCOMMENSURATE MODULATION IN THE SPECTRAL PROPERTIES OF A(2)MECL(4) TYPE CRYSTALS, Physica status solidi. b, Basic research, 207(2), 1998, pp. 509-520
Citations number
37
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physica status solidi. b, Basic research → ACNP
ISSN journal
03701972
Volume
207
Issue
2
Year of publication
1998
Pages
509 - 520
Database
ISI
SICI code
0370-1972(1998)207:2<509:MOIMIT>2.0.ZU;2-H
Abstract
Manifestations of the incommensurate modulation in the optical spectra were analyzed on the example of A(2)MeX(4) type compounds with alkyl ammonium cation. It has been shown that the mentioned materials are ch aracterized by different kinds of the thermooptic memory effect. Besid es, nonfulfilment of the empiric Urbach rule was also considered as a peculiar feature of the incommensurate phases. The nature of this phen omenon has been explained on the basis of data of vibrational spectros copy.