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Measuring electrical parameters of ferroelectric liquid crystals using universal current reversal method

  • Sood, N. (Engineering Materials Division, National Physical Laboratory) ;
  • Khosla, S. (Liquid Crystals Research Lab, Department of Physics, JCDAV College) ;
  • Singh, D. (Department of Physics, Punjabi University) ;
  • Bawa, S.S. (Engineering Materials Division, National Physical Laboratory)
  • Received : 2011.02.22
  • Accepted : 2011.03.23
  • Published : 2011.09.30

Abstract

The universal current reversal method is used for the simultaneous measurement of response time (${\tau}$), azimuthal angle (${\varphi}_o$), spontaneous polarization ($P_S$), and rotational viscosity (${\gamma}_{\varphi}$) of two ferroelectric liquid crystals (FLCs). The application of AC field in FLCs results in reorientational current, which is further analyzed to obtain various parameters. The variation in the parameters with temperature follows the typical trend predicted by the theory. The theoretical curve fits well into the experimental data. Its comparison with traditional current reversal method is confirmed to address certain limitations of that method.

Keywords

References

  1. R.B. Meyer, L. Liebert, L. Strzelecki and P. Keller, J. de. Phys. Lett. (Paris) 36, L69 (1975). https://doi.org/10.1051/jphyslet:0197500360306900
  2. L.A. Bersnev, L.M. Blinov, M.A. Osipov and S.A. Pikin, Mol. Cyst. Liq. Cryst. 158A, 1 (1988).
  3. Y. Kimura and R. Hayakawa, Jpn. J. Appl. Phys. 32, 427 (1993).
  4. K.K. Raina and H.J. Coles, 9th IEEE Int. Symp. on Appl. of Ferroelectrics, USA, CH3416-50-7803, IEEE, 788 (1995).
  5. K.K. Raina and J.K. Ahuja, Mol. Cryst. Liq. Cryst. 338, 125 (1999).
  6. N.A. Clark and S.T. Lagerwall, Appl. Phys. Lett. 36, 11 (1980). https://doi.org/10.1063/1.91297
  7. L.A. Bersnev, V.G. Chigrinov, D.I. Drgachev, E.P. Poshidaev, J. Funfschilling and M. Schadt, Liq. Cryst. 5, 1171 (1989). https://doi.org/10.1080/02678298908026421
  8. J. Funfshcilling and M. Schadt, J. Appl. Phys. 66, 3877 (1989). https://doi.org/10.1063/1.344452
  9. J.K. Ahuja and K.K. Raina, Jpn. J. Appl. Phys. 39, 4076 (2000). https://doi.org/10.1143/JJAP.39.4076
  10. L.M. Blinov, M.I. Barnik, M. Ozaki, N.M. Shtykov and K. Yoshino, Phy. Rev. E, 62 (6), 8091 (2000). https://doi.org/10.1103/PhysRevE.62.8091
  11. M.L.M. Madhumohan, B.V.S. Gaud, P.A. Kumar and V.G.K.M. Pissipati, Mat. Res. Bull. 34 (14), 2167 (1999). https://doi.org/10.1016/S0025-5408(00)00173-2
  12. S.S. Bawa, A.M. Biradar and S. Chandra, Jpn. J. Appl. Phys. 26, 189 (1987). https://doi.org/10.1143/JJAP.26.189
  13. S.S. Bawa, A.M. Biradar, K. Saxena and S. Chandra, Rev. Sci. Instrum. 59 (9), 2023 (1988). https://doi.org/10.1063/1.1140019
  14. S. Khosla and K.K. Raina, Indian J. Pure Appl. Phys. 42, 49 (2004).
  15. Y.P. Panarin and V.M. Vaksman, Mol. Mater. 1, 147 (1992).
  16. V. Panov, J.K. Vij and N.M. Shtykov, Liq. Cryst. 28 (4), 615 (2001). https://doi.org/10.1080/02678290010020175
  17. Hoffmann La Roche, Ltd, Basel, Switzerland.
  18. S. Khosla, N. Sood, K.K. Raina, S.S. Bawa, Mol. Cryst. Liq. Cryst.524, 119 (2010). https://doi.org/10.1080/15421406.2010.484615
  19. S.L. Srivastava, Proc. Natl. Acad. Sci., India, LXIII, 311 (1993).
  20. S.L. Srivastava andV.K. Agarwal, Indian J. Pure Appl. Phys. 31, 59 (1993).
  21. H. Miyata, M. Maeda and I. Suzuki, Liq. Cryst. 20(3), 303 (1996). https://doi.org/10.1080/02678299608032039
  22. S. Wrobel, S. Hiller, M. Pfeiffer, M. Marzec, W. Haase, Liq. Cryst. 18 (1), 21 (1995). https://doi.org/10.1080/02678299508036586
  23. I.C. Khoo, Optics and Non Linear Optics of Liquid Crystals (World Scientific, Singapore, 1993).
  24. T. Carlsson, B. Zeks, C. Fillipic, A. Levstik, and R. Blinc, Mol. Cryst. Liq. Cryst. 163, 11 (1988).
  25. A. Levstik, T. Carlsson, C. Fillipic, I. Levstik and B. Zeks, Phys. Rev. A, 35 (8), 352 (1987).
  26. C. Fillipic, T. Carlsson, A. Levstik, B. Zeks and, R. Blinc, Phys. Rev. A, 38 (10), 5833 (1988). https://doi.org/10.1103/PhysRevA.38.5833
  27. T. Carlsson, B. Zeks, C. Fillipic and A. Levstik, Phys. Rev. A, 42 (2), 877 (1990). https://doi.org/10.1103/PhysRevA.42.877

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