Przeglądaj {{ collection }} wg Autor "Tykarska, Marzena"

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Dielectric and optical properties of liquid crystal 1H6Bi
(Wydawnictwo Politechniki Łódzkiej, 2012) Wojciechowski, Marek; Tykarska, Marzena; Bąk, Grzegorz
Recently synthesized antiferroelectric liquid crystal 1H6Bi shows special optical properties related to change in handedness of the ferroelectric helix. The broadband dielectric measurements of this compound has been carried out, a number of dielectric relaxation modes corresponding to various temperatures and LC phases have been detected. The characteristic parameters of these modes are presented and compared with the optical data.
Dielectric properties of antiferroelectric liquid crystal 4F5Bi(2F)
(Wydawnictwo Politechniki Łódzkiej, 2011) Wojciechowski, Marek; Tykarska, Marzena
Recently synthesized an antiferroelectric liquid crystal compound has been studied by means of dielectric spectroscopy. The dielectric measurements were curried out in a cell with gold electrodes at planar orientation. The characteristics of dielectric relaxation modes in all phases existing in the investigated compound are presented.
Dielectric properties of ferrielectric subphase of liquid crystal MHPOPB
(Wydawnictwo Politechniki Łódzkiej, 2013) Wojciechowski, Marek; Tykarska, Marzena; Bąk, Grzegorz
The antiferroelectric liquid crystal with relatively broad temperature range of ferrielectric subphase was chosen for dielectric investigations of this subphase. In the ferrielectric subphase, collective molecular motions were registered as a ferrielectric Goldstone mode. Theory of ferroelectric Goldstone mode was applied to the registered ferrielectric subphase to obtain rotational viscosity.
Dielectric properties of ferroelectric liquid crystalline material with chiral nematic phase.
(Wydawnictwo Politechniki Łódzkiej, 2015) Wojciechowski, Marek; Bąk, Grzegorz W.; Tykarska, Marzena
The ferroelectric liquid crystal with nematic N* phase has been investigated using broadband low frequency dielectric spectroscopy. The dielectric relaxation modes related to a ferroelectric Goldstone mode were detected only in a narrow temperature range. Well defined relaxation process was detected in the SmB* phase at about 90 Hz.