Orientational coupling amplification in ferroelectric nematic colloids

We investigated the physical properties of low concentration ferroelectric nematic colloids, using calorimetry, optical methods, infra-red spectroscopy and capacitance studies. The resulting homogeneous colloids possess a significantly amplified nematic orientational coupling. We find that the nematic orientation coupling increases by ~10% for particle concentrations of 0.2%. A manifestation of the increased orientational order is that the clearing temperature of a nematic colloid increases by up to 40°C compared to the pure liquid crystal host. A theoretical model is proposed in which the ferroelectric particles induce local dipoles whose effective interaction is proportional to the square of the orientational order parameter

Tilted Photoalignment of a Nematic Liquid Crystal Induced by a Magnetic Field

Nematic liquid crystal cells with polyvinyl cinnamate coated substrates were subjected to ultraviolet light. When this was done in the presence of an oblique magnetic field the photoalignment was found to be temporally and thermally robust, with a large pretilt angle and weak polar anchoring. Moreover, two easy axes with equal and opposite pretilt angle were obtained, such that a magnetic field could switch the director from one easy axis to the other. (C) 1998 American Institute of Physics.</p

Thermal optical non&shy;linearity of nematic mesophase enhanced by gold nanoparticles - an experimental and numerical investigation

The zip archive contains the experimental data and the Matlab software needed to reproduce the figures inThermal optical non&shy;linearity of nematic mesophase enhanced by gold nanoparticles - an experimental and numerical investigationO. Kurochkin, Y.K. Murugesan, T.P. Bennett, G. D&rsquo;Alessandro, Y. Reznikov, B.J. Tang G.H. Mehl and Malgosia KaczmarekTo appear in Physical Chemistry Chemical Physics (2016)</span

Analyzing Powers It11 and T20 of Dp -&gt; Ppn Reaction at 400 Mev Investigated at Nuclotron

One of the tools to study spin structure of short range correlations (SRCs) and three nucleon forces is the measurement of the polarization observables. Deuteron induced reactions at intermediate energies are investigated at Internal Target Station (ITS) of Nuclotron through the dp elastic and dp → ppn reactions. Analyzing powers iT11 and T20 analyzing powers of dp → ppn reaction at 400 MeV are presented