For authors
Submission status

Archive (English)
   Volumes 61-80
   Volumes 41-60
   Volumes 21-40
   Volumes 1-20
   Volumes 81-92
      Volume 92
      Volume 91
      Volume 90
      Volume 89
      Volume 88
      Volume 87
      Volume 86
      Volume 85
      Volume 84
      Volume 83
      Volume 82
      Volume 81
VOLUME 87 (2008) | ISSUE 5 | PAGE 301
Ferrielectric smectic with layer-by-layer change of the two-component order parameter
One of the most remarkable properties of smectics is the wide variety of possible equilibrium structures. In this paper, based on Landau theory of the phase transitions, the transitions between ferroelectric and antiferroelectric phases and structure formed by smectic layers with different azimuthal and polar orientation of molecules were calculated. This unique structure has been predicted (P.V. Dolganov et al., Pis'ma v ZhETF 76, 579 (2002)) using the minimization of the free energy with respect to the phase and modulus of the two-component order parameter, but never detected before. Recently non-resonant Bragg reflection, consistent with the predictions of the model, was found (P. Fernandes et al., Eur. Phys. J. E 20, 81 (2006)) in ferrielectric smectic CFI1* (SmCFI1*) phase. In the 3-layer ferrielectric structure with a macroscopic helical pitch the modulus of the order parameter is larger in anticlinic-like layers and smaller in layers with mixed ordering. The values of the interlayer interactions were determined for smectic liquid crystalline materials forming different polar structures.