Phase Transitions in Liquid Crystal Doped with Magnetic Particles of Different Shapes
In this study, observations of structural transitions in ferronematics based on the thermotropic nematic 4-trans-4′-n-hexyl-cyclohexyl-isothiocyanato-benzene (6CHBT) are described. Droplets of the nematic phase in the isotropic phase were observed in solutions of nematogenic 6CHBT dissolved in phenyl isocyanate and 6CHBT dissolved in phenyl isocyanate and doped with magnetic particles of different shapes (nanorods and chain-like particles). Magneto-dielectric measurements of structural transitions in these new systems enable to estimate of the type of anchoring of the nematic molecules on the magnetic particles surface.
KeywordsFerronematics Liquid crystal Magnetic particles Phase transition
This study was supported by the Slovak Academy of Sciences Grant VEGA No. 0077 and Center of Excellence Nanofluid, Slovak Research and Development Agency under contract No. APVV-0509-07 and contract No. SK-HU-0008-08, the Grenoble High Magnetic Field Laboratory, with support of EC from the 7th FP capacities “Transnational Access”—Contract No. 228043-EuroMagNET II, and with support by European Regional Development Fund Projects 26220120021 and 26220120033.
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