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Journal of Experimental and Theoretical Physics

, Volume 93, Issue 3, pp 533–541 | Cite as

Phase transition to anticlinic texture in free-standing smectic c films

  • V. K. Dolganov
  • E. I. Kats
  • S. V. Malinin
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Abstract

Experimental data on the optical reflectance of free-standing smectic C films were analyzed within the framework of a phenomenological Landau approach. At a certain temperature T0N (determined from experimental data), which exceeds the known temperature Tc of the volume phase transition from smectic A to smectic C state, a surface phase transition takes place whereby molecules in the surface layer become sloped relative to the normal of the smectic layers. The transition temperatures T 0N s,a for N-layer films possessing synclinic (symmetric) and anticlinic (antisymmetric) textures of the order parameter (tilt angle θ) were determined. A comparison of the theoretical and experimental data allowed all parameters of the model to be determined (including critical indices of the correlation length and the surface order parameter). Three possible models of the transition from the state with transverse polarization (perpendicular to the molecular tilt plane) to the state with longitudinal polarization (parallel to this plane) are analyzed. The transition takes place at low (°–°) values of the order parameter θ in the middle layer of the film.

Keywords

Phase Transition Elementary Particle Tilt Angle Correlation Length Middle Layer 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© MAIK "Nauka/Interperiodica" 2001

Authors and Affiliations

  • V. K. Dolganov
    • 1
  • E. I. Kats
    • 2
    • 3
  • S. V. Malinin
    • 2
    • 4
  1. 1.Institute of Solid State PhysicsRussian Academy of SciencesChernogolovka, Moscow oblastRussia
  2. 2.Landau Institute of Theoretical PhysicsRussian Academy of SciencesChernogolovka, Moscow oblastRussia
  3. 3.Institute Laue-LangevinGrenobleFrance
  4. 4.Forschungszentrum JuelichJuelichGermany

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