2020 Impact factor 1.890
Soft Matter and Biological Physics

Eur. Phys. J. E 1, 137-140

Phase transitions between orthogonal and tilted hexatic phases

D. Pociecha1 - E. Gorecka1 - J. Przedmojski2

1 Laboratory of Dielectrics and Magnetics, Department of Chemistry, Warsaw University, Al. Zwirki i Wigury 101,
02-089 Warsaw, Poland
2 Department of Physics, Warsaw Technical University, ul. Koszykowa 75, 00-662 Warsaw, Poland

Received 21 June 1999

Tilt-driven phase transitions between hexatic smectic phases: SmF-HexB and reversed HexB-SmF have been studied in compounds belonging to two enaminoketone derivative homologue series. The tilt angle order parameter has been measured and its temperature dependence near the phase transition point has been described by applying mean-field model. For both phase sequences the tricritical points have been observed on phase transition lines in binary mixtures of respective materials having first and second order phase transitions between hexatic phases.

64.70.Md Transitions in liquid crystals

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