Dielectric properties of gadolinium-based liquid crystalline complex
- Authors: Dobrun L.A.1, Kovshik A.P.1, Ryumtsev E.I.1, Galyametdinov Y.G.2, Knyazev A.A.2
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Affiliations:
- St. Petersburg State University
- Kazan National Research Technical University
- Issue: Vol 62, No 5 (2017)
- Pages: 753-757
- Section: Liquid Crystals
- URL: https://journals.rcsi.science/1063-7745/article/view/191324
- DOI: https://doi.org/10.1134/S1063774517050042
- ID: 191324
Cite item
Abstract
The permittivity components of the liquid crystalline gadolinium complex with Lewis bases and β-diketonates as ligands are measured in the frequency range from 100 Hz to 5 MHz. The magnitude and sign of the dielectric anisotropy of the complex are determined. Two dispersion regions of the permittivities are found in the liquid crystalline phase. The mechanisms responsible for the relaxation phenomena occurring in the sample are established. The dielectric relaxation times, activation energies, and dipole moment of the complex are obtained. The results of the study are compared with the dielectric properties of ytterbium and terbium complexes having the same ligand environment.
About the authors
L. A. Dobrun
St. Petersburg State University
Author for correspondence.
Email: l.dobrun@spbu.ru
Russian Federation, St. Petersburg, 199034
A. P. Kovshik
St. Petersburg State University
Email: l.dobrun@spbu.ru
Russian Federation, St. Petersburg, 199034
E. I. Ryumtsev
St. Petersburg State University
Email: l.dobrun@spbu.ru
Russian Federation, St. Petersburg, 199034
Yu. G. Galyametdinov
Kazan National Research Technical University
Email: l.dobrun@spbu.ru
Russian Federation, Kazan, Tatarstan, 420015
A. A. Knyazev
Kazan National Research Technical University
Email: l.dobrun@spbu.ru
Russian Federation, Kazan, Tatarstan, 420015