We have carried out a detailed study of the smectic-A -smectic-C transition in butyloxybenzy-Iidene heptylaniline (40.7) using high-resolution x-ray, heat-capacity, and light scattering techniques. Although the order-parameter data are consistent with heliumlike critical behavior, the data as a whole are uniquely described by a mean-field Landau módel with an anomalously large sixth-order term.
Relation:
Physical Review A (General Physics) 27(2), pp.1251-1254
