Sensitivity of 6CHBT liquid crystal doped with ferro electric or magnetic particles to electric and magnetic fields

Abstract

Introduction of ferroelectric or magnetic nanoparticles into nematic liquid crystal is a promising method for the improvement of the electro-optic or magneto-optic properties of different nematic liquid crystals by non chemical way. This work is devoted to the study of composite systems of liquid crystal with spherical ferroelectric or magnetic particles with the aim to study their sensitivity to electric and magnetic fields. The nematic 4-(trans-4’-n-hexylcyclohexyl)-isothiocyanatobenzene (6CIIBT) liquid crystal was doped with S1>SI ferroelectric particles or with Fe.-îOi magnetic particles. The structural transitions in ferronematic samples were indicated by capacitance measurements in a capacitor made of ITO-coated glass electrodes in combined electric and magnetic fields. The obtained results showed the increase of the shift in critical voltage with increasing magnetic field in both kinds of samples.