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Dielectric spectroscopy of the SmQ* phase
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SYSNO ASEP 0369921 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Dielectric spectroscopy of the SmQ* phase Author(s) Perkowski, P. (PL)
Bubnov, Alexej (FZU-D) RID, ORCID, SAI
Piecek, W. (PL)
Ogrodnik, K. (PL)
Hamplová, Věra (FZU-D) RID, ORCID, SAI
Kašpar, Miroslav (FZU-D) RIDSource Title Phase Transitions. - : Taylor & Francis - ISSN 0141-1594
Roč. 84, 11-12 (2011), s. 1098-1107Number of pages 10 s. Language eng - English Country GB - United Kingdom Keywords chiral liquid crystal ; dielectric spectroscopy ; antiferroelectric phase ; smectic Q phase ; elaxation mode Subject RIV BM - Solid Matter Physics ; Magnetism R&D Projects IAA100100911 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) MEB050828 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) GA202/09/0047 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) GAP204/11/0723 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z10100520 - FZU-D (2005-2011) UT WOS 000299705900021 DOI 10.1080/01411594.2011.580432 Annotation Liquid crystalline (LC) material possessing two biphenyl moieties in the molecular core and lateral chlorine substitution far from the chiral chain has been studied by the broadband dielectric spectroscopy within frequency range 100 Hz-2 MHz. On cooling from the isotropic phase, the material possesses the frustrated smectic Q* (SmQ*) and the antiferroelectric smectic (SmCA*) phases within a broad temperature range. It has been confirmed by dielectric spectroscopy that the SmQ phase is closely related to SmCA* antiferroelectric phase. Only one relaxation process has been observed in the SmQ* phase, while in the SmCA* phase two relaxation are clearly detectable. It seems that mode found in the SmQ is connected with high frequency anti-phase mode observed in the SmCA* phase; this mode is weaker and faster than that in the SmCA* phase. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2012
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