Phase transitions in liquid crystals under negative pressures.
We report the first measurements of orientational order parameters and phase transition temperatures in nematic and smectic A liquid crystals under negative pressures generated by an isochoric cooling of small droplets embedded in a glass former. Comparison of isobaric and isochoric measurements allows us to estimate the coefficients coupling the order parameter and density of an extended Landau--de Gennes model of the nematic phase.
Manjuladevi
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V
Raman Research Institute, C. V. Raman Avenue, Bangalore- 560080, India.
Pratibha
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R
Madhusudana
N V
NV