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Dielectric properties of chiral ferroelectric liquid crystalline compounds with three aromatic rings connected by ester groups
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SYSNO ASEP 0509430 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Dielectric properties of chiral ferroelectric liquid crystalline compounds with three aromatic rings connected by ester groups Tvůrce(i) Das, M.K. (IN)
Barman, B. (IN)
Das, B. (IN)
Hamplová, Věra (FZU-D) RID, ORCID, SAI
Bubnov, Alexej M. (FZU-D)Celkový počet autorů 5 Zdroj.dok. Crystals. - : MDPI - ISSN 2073-4352
Roč. 9, č. 9 (2019), s. 1-13Poč.str. 13 s. Jazyk dok. eng - angličtina Země vyd. CH - Švýcarsko Klíč. slova ferroelectric liquid crystals ; lactic acid derivative ; dielectric spectroscopy ; dielectric strength ; relaxation time ; structure property correlations Vědní obor RIV JJ - Ostatní materiály Obor OECD Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics CEP GA19-03564S GA ČR - Grantová agentura ČR Způsob publikování Open access Institucionální podpora FZU-D - RVO:68378271 UT WOS 000487979700024 EID SCOPUS 85073319054 DOI 10.3390/cryst9090473 Anotace The tilted ferroelectric SmC* phase of three structurally different series of lactic acid derivatives with ester linkage groups in the molecular core has been studied by broad band dielectric spectroscopy. The dielectric spectra strongly depend both on the temperature as well as the specific molecular structure of the self-assembling compounds possessing the ferroelectric polar order. In the SmC* phase, the real and imaginary parts of the complex permittivity increase up to certain temperature near the SmC*-N*/SmA* transition and then decreases with increasing temperature, perhaps due to the disruption of the molecular domains at the onset of the SmA*/N* phase transition. The dielectric strength is also influenced by the difference in the alkyl chain length and type of linkage group of the constituent molecules. The relaxation time and the relaxation frequency are found to vary with the molecular structure of the studied ferroelectric compounds.
Pracoviště Fyzikální ústav Kontakt Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Rok sběru 2020 Elektronická adresa http://hdl.handle.net/11104/0300180
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