Dielectric Relaxation of 4-Cyanophenyl 4'-n-Decyloxybenzoate in the Isotropic, Nematic, and Smectic A Phases

• Authors: M. Ginovska , G. Czechowski , A. Andonovski , J. Jadżyn
• Languages of publication: EN

Abstracts

EN

The paper presents the results of the dielectric relaxation study performed for the isotropic, nematic, and smectic A phases of 4-cyanophenyl 4'-n-decyloxybenzoate (C_{10}H_{21}O-Ph-COO-Ph-C≡ N, CP10DB) in the frequency range from 100 kHz to 100 MHz. In the nematic and smectic A phases the permittivity was measured with the probing electric field E parallel to the macroscopic molecular orientation (the director n). The recorded dielectric spectra correspond to the rotation of CP10DB molecules around the short axis and can be quite well described in the framework of the Debye model. It was found that the values of the activation energy for the molecular reorientations in the isotropic and smectic A phases of CP10DB are quite close to each other, whereas in the nematic phase the energy is remarkably higher.

Keywords

EN

64.70.Md; 77.84.Nh; 77.22.Gm

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2000
• Volume: 98
• Issue: 6
• Pages: 715-720

Dates

published

2000-12

received

2000-10-12

Contributors

author

M. Ginovska

• University of Sts. Cyril & Methodius, Faculty of Electrical Engineering, P.O. Box 574, 91000 Skopje, Macedonia

author

G. Czechowski

• Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Poznań, Poland

author

A. Andonovski

• University of Sts. Cyril & Methodius, Faculty of Natural Sciences and Mathematics, P.O. Box 157, 91000 Skopje, Macedonia

author

J. Jadżyn

• Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Poznań, Poland