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Abstract

The solid dielectrics used in the capacitors exhibit rather high-frequency relaxations. This means that in the radio-frequency range, the capacitors exhibit a constant capacity. When a liquid crystal is put into the capacitors, it is observed that in the radio-frequency range the capacity changes (decreases with frequency). This is due to the fact that liquid crystals exhibit relaxation in the radio-frequency range. In this paper, the formulas for the electric response of a low-frequency RC filter with liquid crystal characterized by complex electric permittivity are derived. One Debye-type relaxation is assumed in the calculations. The influence of strengths and relaxation time (frequency) of relaxation mode in liquid crystal on the electric response of low-frequency filters is discussed.
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Bibliography

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  11. Perkowski, P. The parasitic effects in high-frequency dielectric spectroscopy of liquid crystals – the review. Crys. 48, 767–793 (2021). https://doi.org/10.1080/02678292.2020.1852619
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  13. Mrukiewicz, M., Perkowski, P., Strzeżysz, O., Węgłowska, D. & Piecek. Pretransitional effects in a mesogenic mixture under an electric field, Phys. Rev. E. 97, 052704 (2018). https://doi.org/10.1103/PhysRevE.97.052704
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  16. Mandle, R. , Cowling, S. J. & Goodby, J. W. Rational design of rod-like liquid crystals exhibiting two nematic phases. Chem. Eur. J. 23, 14554–14562 (2017). https://doi.org/10.1002/chem.201702742
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Authors and Affiliations

Paweł J. Perkowski
1
ORCID: ORCID

  1. Institute of Applied Physics, Military University of Technology, 2 gen. Kaliskiego St., 00-908 Warsaw, Poland
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Abstract

The hierarchical structure of InSe<β-CD<FeSO4>> composition with 4-fold grade expansion was synthesized with the intercalation-deintercalation technique. Electrical properties of the structure obtained were examined using impedance and thermostimulated current spectroscopy methods. Influence of temperature, static magnetic field and illumination on electrical properties of the synthesized compound was investigated. Changes in the impurity spectrum of the expanded hierarchical structure were analyzed and extraordinary magneto- and photoimpedance behavior of InSe<β-CD<FeSO4>> at room temperature was explained.

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Authors and Affiliations

T. Popławski
I. Bordun
A. Pidluzhna
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Abstract

The electrical properties and behaviour in constant magnetic field of fourfold expanded GaSe matrix intercalated with SmCl 3 guest were investigated by means of impedance spectroscopy and cyclic voltammetry. It was determined that the synthesized GaSe< SmCl 3> clathrate of 4-fold expansion demonstrates the coexistence of mechanisms of generation, transformation and accumulation of electric energy on a quantum level. These mechanisms are driven from external sources of magnetic, thermal and electric field without Faradaic reactions. Therefore, investigated GaSe< SmCl 3> structure is of great attraction in multivoltaics as a prototype of new class of materials. Quantum mechanical model of electro motive force of spin nature is proposed. The main focus of work lies in the prospects of synthesized clathrates for the development of power nanosources and gyrator-free delay nanolines controlled by means of magnetic field.
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Authors and Affiliations

Fedir Ivashchyshyn
1 2
ORCID: ORCID
Anna Pidluzhna
2
ORCID: ORCID
Dariusz Calus
1
ORCID: ORCID
Orest Hryhorchak
3
ORCID: ORCID
Piotr Chabecki
1
ORCID: ORCID
Oleksandr Makarchuk
1 2
ORCID: ORCID

  1. Czestochowa University of Technology, Al. Armii Krajowej 17, 42-200 Czestochowa, Poland
  2. Lviv Polytechnic National University, Bandera 12, Lviv, 79013, Ukraine
  3. Ivan Franko Lviv National University, Cyril and Methodius 8, Lviv, 79005, Ukraine

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