International Journal of
Physical Sciences

  • Abbreviation: Int. J. Phys. Sci.
  • Language: English
  • ISSN: 1992-1950
  • DOI: 10.5897/IJPS
  • Start Year: 2006
  • Published Articles: 2569

Full Length Research Paper

Dielectric, optical and thermodynamical properties of liquid crystal sample exhibiting SmA phase

Rajiv Manohar*1, Abhishek Kumar Srivastava1, Jyotishman1, J.P Shukla1A.K.Prajapati2 and N.L.Bonde2
1Department of Physics, Lucknow University, Lucknow-226006, India 2Applied Chemistry Department,Faculty of Technology and Engineering,The Maharaja Sayajirao University of Baroda,P.B.No. 51, Kalabhavan, Vadodara-390 001, India.
Email: [email protected]

  •  Accepted: 20 November 2006
  •  Published: 30 November 2006

Abstract

The dielectric constant and dielectric loss with dielectric anisotropy have been measured as a function of temperature in the frequency range of 1 kHz to 10 MHz for a newly synthesized liquid crystal sample-exhibiting SmA phase. The measurement in SmA phase indicates dielectric relaxation at frequency 4.778 kHz for 80 0C. The Enthalpy of activation was found to be 14.57 Kcal/mole. The results have been explained on the basis of Maier and Meier theory. The optical anisotropy study, white light transmittance study has also been carried out on the sample. Phase transition temperature matches very well as obtained from all the above mentioned measurement techniques. Optical anisotropy data has been used to determine order parameter by Vuks approach and its variation with temperature has been discussed.

 

Key words: Liquid Crystals, Dielectric Properties, Refractive Indices, Optical Transmittance.

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