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Liquid crystalline swallow‐tailed compounds (II) dielectric relaxation
Author(s) -
Kresse H.,
Rabenstein P.,
Stettin H.,
Diele S.,
Demus D.,
Weissflog W.
Publication year - 1988
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.2170230119
Subject(s) - dielectric , condensed matter physics , liquid crystal , dipole , perpendicular , relaxation (psychology) , anisotropy , phase (matter) , phase transition , dielectric spectroscopy , anomaly (physics) , materials science , atmospheric temperature range , cole–cole equation , range (aeronautics) , nuclear magnetic resonance , chemistry , optics , physics , thermodynamics , composite material , geometry , organic chemistry , optoelectronics , mathematics , psychology , social psychology , electrode , electrochemistry
Dielectric investigations in the kHz‐range on swallow‐tailed liquid crystals show a strong decrease of the dielectric constant as well as of the dielectric loss parallel to the nematic director with decreasing temperature. In the perpendicular direction no strong anomaly has been observed. By consideration of X‐ray data of the S A phase the dielectric results can be interpreted by the dipole‐dipole interaction which is forced by the anisotropy of repulsive forces of the respective molecules.