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    • Dielectric relaxation studies in 5CB nematic liquid crystal at 9 GH$_z$ under the influence of external magnetic field using microwave cavity spectrometer

      Manoj Johri Abhay Saxena S Johri S Saxena D P Singh

      Volume 76 Issue 4 April 2011 pp 621-628

    • Fulltext

       

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/pram/076/04/0621-0628

    • Keywords

       

      Dielectric relaxation; phase transition; liquid crystals; microwaves.

    • Abstract

       

      Resonance width, shift in resonance frequency, relaxation time and activation energy of 5CB nematic liquid crystal are measured using microwave cavity technique under the influence of an external magnetic field at 9 GHz and at different temperatures. The dielectric response in liquid crystal at different temperatures and the effects of applied magnetic field on transition temperatures are studied in the present work. The technique needs a small quantity (< 0.001 cm3) of the sample and provides fruitful information about the macroscopic structure of the liquid crystal.

    • Author Affiliations

       

      Manoj Johri1 Abhay Saxena1 S Johri1 S Saxena2 D P Singh1

      1. Department of Physics & Electronics; Dayanand Anglo-Vedic College, Chhatrapati Shahu Ji Maharaj University, Kanpur 208 001, India
      2. Department of Chemistry & Biochemistry, Dayanand Anglo-Vedic College, Chhatrapati Shahu Ji Maharaj University, Kanpur 208 001, India

    • Dates

       
      Published
      April 2011
      Manuscript received
      25 March 2009
      Manuscript revised
      30 August 2010
      Accepted
      2 December 2010

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