Dielectric properties of N-SmC* liquid crystalline composite


YILMAZ CANLI N. , Yakuphanoglu F., Yasa O., BİLGİN ERAN B.

Optoelectronics and Advanced Materials, Rapid Communications, vol.4, no.6, pp.821-827, 2010 (Journal Indexed in SCI Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 4 Issue: 6
  • Publication Date: 2010
  • Title of Journal : Optoelectronics and Advanced Materials, Rapid Communications
  • Page Numbers: pp.821-827
  • Keywords: Dielectric anisotropy, Electrical properties, Liquid crystal

Abstract

The dielectric relaxation and anisotropy properties of 4-cyano-4'-pentylbiphenyl and salicylaldimine compound (LC1) liquid crystals have been investigated. The polarizing microscopy and differential scanning calorimetry results show that the chiral salicylaldimine compound (LC1) exhibits enantiotropic SmC* mesophases. The dielectric anisotropy of the liquid crystals changes from positive type to negative type. The critical frequency values of dielectrical anisotropy for 4-cyano-4'-pentylbiphenyl and salicylaldimine compound (LC1) were found to be 693.84 and 577.61 kHz, respectively. The dielectric anisotropy value of 5CB/LC1 liquid crystal composite is lower than 5CB liquid crystal. It is evaluated that the 5CB/LC1 composite liquid crystal gives new dielectrical anisotropy and electrical properties.