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On the Dielectric Behavior of Unaligned Samples of 4‐n‐Octyl‐4′‐cyanobiphenyl (8CB)
Author(s) -
Schoenhals A.,
Zubowa H.L.,
Fricke R.,
Frunza S.,
Frunza L.,
Moldovan R.
Publication year - 1999
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/(sici)1521-4079(199912)34:10<1309::aid-crat1309>3.0.co;2-9
Subject(s) - dielectric , relaxation (psychology) , liquid crystal , materials science , permittivity , isotropy , dielectric permittivity , range (aeronautics) , atmospheric temperature range , relative permittivity , analytical chemistry (journal) , thermodynamics , condensed matter physics , chemistry , optics , physics , optoelectronics , composite material , organic chemistry , psychology , social psychology
Data on the dielectric properties of the liquid crystal 4‐octyl‐4′‐cyanobiphenyl (8CB) have been determined onto unaligned samples, for a large scale of frequency, as function of temperature. The components of the complex dielectric permittivity as well as the corresponding dielectric parameters were evaluated using Havriliak‐Negami (HN) functions. The dielectric characteristics were discussed and were compared with the literature, a good agreement being observed. The method allows to obtain for the first time the dielectric strength for a large range of the temperature and gives the two functions describing the relaxation processes in the isotropic range.