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An influence of the orientation mechanism on the value of the nonlinear dielectric effect for the isotropic—nematic transition

✍ Scribed by S.J. Rzoska; J. Zioło; W. Pyżuk

Publisher
Elsevier Science
Year
1992
Tongue
English
Weight
231 KB
Volume
197
Category
Article
ISSN
0009-2614

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✦ Synopsis

Results of studies of the nonlinear dielectric effect in a liquid crystal material of a large, positive anisotropy of electric permittivity are reported. Measurements have been conducted in the isotropic phase, on approaching the nematic phase, of HCPP (5heptylo-2-(4'cyanophenylpyrimidine)

for two frequencies: 1.5 and 6.1 MHz. For the higher frequency a strong decrease on approaching the clearing temperature was observed. For the lower frequency the opposite situation takes place. A quantitative explanation of this behaviour is proposed.

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