Search results

Sort By:

Limit search:

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

100%

Ginovska M., Czechowski G., Andonovski A., Jadżyn J.

Acta Physica Polonica A

2000

vol. 98

issue 6

715-720

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.

Anomalous Dielectric Relaxation in Binary Mixtures of Mesogenic Solvent/Non-Mesogenic Solute

88%

Jadżyn J., Bauman D., Déjardin J., Ginovska M., Czechowski G.

Acta Physica Polonica A

2005

vol. 108

issue 3

479-489

Dielectric relaxation studies for mixtures of strongly polar and mesogenic n-heptylcyanobiphenyl with non-polar and non-mesogenic carbon tetrachloride (CCl_4) were performed. The absorption band broadening due to fractional diffusion was observed. A correlation between the non-mesogenic admixture concentration and the anomalous diffusion exponent was found.

Refine search results

2 Acta Physica Polonica A

1 2005

1 2000

2 Czechowski G.

2 Ginovska M.

2 Jadżyn J.

1 Andonovski A.

1 Bauman D.

1 Déjardin J.

Search results

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

Anomalous Dielectric Relaxation in Binary Mixtures of Mesogenic Solvent/Non-Mesogenic Solute