Ferroelectricity of Chiral Compounds in Highly Ordered Smectic Phases

Abstract

Measurements of the complex electric permitttivity for the Sm C* and for three highly ordered smectic phases: Sm I*, Sm J* and Sm K* of 4- (2 - methylbutyl)-phenyl-4′-(octyloxy)-(1,1′)-biphenyl-4-carboxylate (8 OSI) have been done in the frequency range from 5 Hz to 13 MHz. For the first three chiral phases the Goldstone mode was found with temperature independent critical frequencies, νc = 1.5kHz and the relaxation time τG = 106 μs - for the Sm C* phase, and νc = 1 kHz and τG - 160 μs - for the Sm I* one. In two highly ordered smectics, i.e. Sm J* and Sm K* with inter-layer correlations, the Goldstone mode seems to be suppressed. By applying a D.C. bias field of 1.4 kV/cm the Goldstone mode has been suppressed and shifted towards higher frequencies in both the Sm C* and Sm I* phase. For the Sm J* phase the Goldstone mode is very weak and practically insensitive to the bias field used. In the Sm K* phase there is no Goldstone mode like relaxation, and the only contribution to electric permittivity comes from the fast molecular motion connected with reorientation of molecules about their long axis.

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References

  1. 1.

    R. B. Meyer, L. Liebert, L. Strzelecki and P. Keller, J. de Phys. Lett, 36, 69 (1975).

    Article  Google Scholar 

  2. 2.

    G. W. Gray and J. W. Goodby, Smectic Liquid Crystals, Leonard and Hill, Glasgow and London 1984.

    Google Scholar 

  3. 3.

    W. Kuczynski and H. Stegemeyer, Ferroelectrics 5, 553(1989).

    Google Scholar 

  4. 4.

    M. F. Bone, D. Coates, Α. Β. Davey, Mol. Cryst. Liq. Cryst. 102, 331(1984).

    CAS  Article  Google Scholar 

  5. 5.

    R. J. Cava, J.S. Patel and E. A. Rietman, J. Appl. Phys. 60, 3093(1986).

    CAS  Article  Google Scholar 

  6. 6.

    D. Brok, A. Aharony, R. J. Birgeneau, K. Evans-Lutterodt, J.D. Litster, P.M. Horn, G. B. Stephenson and A. J. Tajbakhsh, Phys. Rev. Lett. 57, 98(1986).

    Article  Google Scholar 

  7. 7.

    A. J. Leadbetter, J. P. Gaughan, B. Kelly, G. W. Gray and J. W. Goodby, J. Phys. (Paris), Colloq. 3, 40, p.C1(1979).

  8. 8.

    A. M. Biradar, S. Wróbel and W. Haase, Phys. Rev. A 39, 2693 ( 1989); Liquid Crystals 5, 1227(1989).

    CAS  Article  Google Scholar 

  9. 9.

    A. M. Biradar, S. Wróbel and W. Haase, Ferroelectrics (in print).

  10. 10.

    S. Wróbel, A. M. Biradar and W. Haase, Ferroelectrics 100, ......... (1989).

  11. 11.

    M. Glogarowa, J. Fousek, L. Lejcek and J. Pavel, Ferroelectrics 58, 161 (1984).

    Article  Google Scholar 

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Correspondence to Stanisław Wróbel.

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Wróbel, S., Pfeiffer, M., Biradar, A. et al. Ferroelectricity of Chiral Compounds in Highly Ordered Smectic Phases. MRS Online Proceedings Library 173, 525–530 (1989). https://doi.org/10.1557/PROC-173-525

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