Ss. Roy et al., INFLUENCE OF PIEZOELECTRIC BILINEAR AND BIQUADRATIC COUPLING IN SMECTIC C-ASTERISK PHASE OF FERROELECTRIC LIQUID-CRYSTAL, International journal of modern physics b, 11(29), 1997, pp. 3491-3502
A theoretical relation has been developed from the Landau free energy
expansion between SmC-SmA phase transition temperature of chiral smect
ic compound and that of its nonchiral analogue. The bilinear and biqua
dratic coupling constant and the quadrupolar order parameter have been
determined from the extended microscopic model in the chiral smectic-
C (Sm-C) phase of four ferroelectric liquid crystal (FLC) materials a
nd results have been discussed.