1 February 1998 Measurements of rotational viscosity of SmC* mixtures
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The rotational viscosity γφ has been studied for SmC* phase of ferroelectric liquid crystal mixtures containing a different amount of the same chiral dopant. Goldstone mode rotational viscosity γφ has been determined by two different methods. The first one is an electrooptical method, the second is a dielectric method using samples with unperturbed helicoidal structure. This method is based on measurements of Goldstone mode dielectric strength and relaxation frequency supplemented with values of the spontaneous polarization, the tilt angle. The rotational viscosity has been presented as a function of chiral dopant concentration and as a function of temperature. Results have been discussed in context of the dynamics of the structure under electric field.
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Wiktor Piecek, Wiktor Piecek, Jolanta Rutkowska, Jolanta Rutkowska, Jerzy Kedzierski, Jerzy Kedzierski, Pawel Perkowski, Pawel Perkowski, Zbigniew Raszewski, Zbigniew Raszewski, Roman S. Dabrowski, Roman S. Dabrowski, "Measurements of rotational viscosity of SmC* mixtures", Proc. SPIE 3318, Liquid Crystals: Physics, Technology, and Applications, (1 February 1998); doi: 10.1117/12.299958; https://doi.org/10.1117/12.299958

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