TITLE

Importance of quadrupolar ordering in antiferroelectric liquid crystal devices

AUTHOR(S)
Parry-Jones, L. A.; Elston, S. J.
PUB. DATE
September 2001
SOURCE
Applied Physics Letters;9/24/2001, Vol. 79 Issue 13
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A model of switching in antiferroelectric liquid crystals is presented which predicts both helix unwinding in the pretransitional regime and a field induced transition to the ferroelectric state. When the ratio of the coefficients of the quadrupolar and dipolar ordering terms in the bulk free energy expression exceeds a critical value, the latter transition becomes first order, in agreement with experimental observation. We have determined these coefficients in the commercial mixture CS4001. The ratios of the coefficients imply that all three states (antiferroelectric and two ferroelectric) are stable in the ground state, i.e., antiferroelectric liquid crystals are truly tristable. © 2001 American Institute of Physics.
ACCESSION #
5193846

 

Related Articles

  • Composite pulse magic echo sequence in three-level systems. Gengying, Li; Dongsheng, Wang; Xuewen, Wu // Review of Scientific Instruments;Apr88, Vol. 59 Issue 4, p569 

    Composite pulse quadrupole echo sequences significantly reduce distortions due to finite pulsewidth effects, but they also produce phase dispersion leading to distortions of the quadrupolar powder line shape. In order to correct for phase errors arising from the composite pulse, we present the...

  • Alignment visualization using electroconvection of planar nematics. Bock, T. M.; Bla¨sing, J.; Frette, V.; Rehberg, I. // Review of Scientific Instruments;Jul2000, Vol. 71 Issue 7 

    In electroconvection experiments with planarly aligned nematic liquid crystals the director orientation is, conventionally, fixed through a mechanical treatment (rubbing) of the polymer-coated electrodes. Without rubbing, on the other hand, the flow direction during sample filling imposes the...

  • Electrically controlled continuous tilt of optical axis in ferroelectric chiral smectic liquid.... Mori, Takeshi; Toyoda, Yoshihiko // Applied Physics Letters;2/28/1994, Vol. 64 Issue 9, p1065 

    Examines the continuous tilt of an optical axis caused by an applied alternating current voltage in a ferroelectric chiral smectic liquid crystal cell. Advantages of the ferroelectric liquid crystal; Definition of the apparent optical axis; Effects of field-induced distortion of the liquid...

  • Room-temperature switching behavior of ferroelectric liquid crystals in thin cells. Patel, J. S. // Applied Physics Letters;12/15/1985, Vol. 47 Issue 12, p1277 

    Ferroelectric liquid crystal confined between glass plates with a conductive coating and an alignment promoting layer is examined for bistability and threshold behavior. Bistability and the presence ora dynamic threshold are established in thin cells around 1-2 µm thick. When 1/(pulse width)...

  • Short-pitch helicoidal modes in antiferroelectric liquid crystals and scattering of resonant x rays. Gorkunov, M. V.; Pikin, S. A.; Haase, W. // JETP Letters;2/10/99, Vol. 69 Issue 3, p243 

    The structure of antiferro- and ferroelectric phases in chiral smectic liquid crystals is studied on the basis of the theory of modes with a short pitch. The existence of ferroelectric phases is explained both by the characteristic incommensurability of short-pitch modes with respect to the...

  • Charge-controlled phenomena in the surface-stabilized ferroelectric liquid-crystal structure. Hartmann, W. J. A. M. // Journal of Applied Physics;8/1/1989, Vol. 66 Issue 3, p1132 

    Presents a study which investigated the surface-stabilized ferroelectric liquid crystal structure. Experimental details; Results and discussion; Conclusion.

  • Quantitative calculation of spontaneous polarization in ferroelectric liquid crystals. Terzis, Andreas F.; Photinos, Demetri J.; Samulski, Edward T. // Journal of Chemical Physics;9/8/1997, Vol. 107 Issue 10, p4061 

    Examines the quantitative calculation of spontaneous polarization in ferroelectric liquid crystals. Segmental orientational ordering in tilted smectics; Values of the tilt angle for the biphenyl core.

  • Very low-frequency hysteresis loops in ferroelectric liquid crystals: A new optical technique. Etxebarria, J.; Jubindo, M. A. Pérez; Ezcurra, A.; Tello, M. J. // Journal of Applied Physics;5/15/1988, Vol. 63 Issue 10, p4921 

    Focuses on a study which described the optical technique for quantitative studies of switching processes in ferroelectric liquid crystals. Methods for studying molecular orientation; Principle of the method; Analysis of the switching process of a 9-µm-thick sample of...

  • Ferroelectric liquid-crystal light valve addressed by laser heating. Nakamura, Kenichi; Nanataki, Hideo; Arimoto, Masashi // Journal of Applied Physics;1/15/1990, Vol. 67 Issue 2, p996 

    Employs ferroelectric liquid-crystal cells where the liquid-crystals have bistable states with respect to molecular alignment. Time response of transmission intensity change with the application of a single pulse voltage; Temperature dependence of transmission intensity change due to...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics