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      https://www.ias.ac.in/article/fulltext/pram/094/0106

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    • Abstract

       

      In this work, we present the effect of electric field on 4-(trans-4$^\prime$-n-alkyl-cyclohexyl) isothiocyanatebenzene(nCHBT) liquid crystal (LC) molecules. Under the influence of an electric field, the birefringence exhibits the even–odd effect while order parameter, HOMO–LUMO gap, magic angle, isotropic polarisability, range of director angle and the refractive index do not exhibit any even–odd effect. The extension of the alkyl chain length of the nCHBT liquid crystal molecule exhibits the even–odd effect for the dipole moment and temperature from nematic to isotropic phase transition while the HOMO–LUMO gap remains constant. Still, order parameters, isotropic polarisability and refractive index have continuously increased. The odd carbon atom numbers present higher values than the even carbon atom numbers of the alkyl chain for the phase transition temperature. The nCHBTLC molecule expresses the order parameter, and birefringence is reciprocal to each other. For the whole series, there is an increase in order parameter, and a decrease in birefringence. The influence of the external electric field is analternative to the temperature for the optical parameter of nCHBT LC.

    • Author Affiliations

       

      NARINDER KUMAR1 SHIVANI CHAUDHARY1 PRANAV UPADHYAY2 A K DWIVEDI3 DEVESH KUMAR1

      1. 1Department of Physics, School for Physical & Decision Sciences, Babasaheb Bhimrao Ambedkar University, Vidya Vihar, Raebareli Road, Lucknow 226 025, India
      2. 2Department of Physics, Sri J.N.P.G College (KKC), Charbagh, Lucknow 226 001, India
      3. 3Deparment of Physics, M.L.K.P.G. College, Balrampur 271 201, India
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  • Pramana – Journal of Physics | News

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