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High-resolution birefringence study at the nematic-smectic A phase transition of ZnS nano particle dispersed octyloxycyanobiphenyl

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  • Malay Kumar Das
  • Purna Chandra Barman
  • Sudipta Kumar Sarkar

Abstract

We have studied the effect of ZnS nano particles with different concentrations on the nematic to smectic A (N-SmA) phase transition of a thermotropic liquid crystal octyloxycyanobiphenyl (8OCB). These effects are probed using a high resolution optical birefringence measurement. A decreasing trend of the nematic range of 8OCB has been observed up to a certain limit with increasing concentrations of the guest nano particles. A simple power law analysis has been carried out to extract the critical exponent (α) at the N-SmA phase transition, which allows one to investigate the critical behaviour near the phase transition as well as the universality class. The critical exponent (α) at the N-SmA phase transition strongly indicates the change in the coupling strength between the nematic and smectic A order parameters. Copyright EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2015

Suggested Citation

  • Malay Kumar Das & Purna Chandra Barman & Sudipta Kumar Sarkar, 2015. "High-resolution birefringence study at the nematic-smectic A phase transition of ZnS nano particle dispersed octyloxycyanobiphenyl," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 88(7), pages 1-5, July.
    • Handle: RePEc:spr:eurphb:v:88:y:2015:i:7:p:1-5:10.1140/epjb/e2015-60202-7
    DOI: 10.1140/epjb/e2015-60202-7
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    Statistical and Nonlinear Physics;

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