title: Smectic-C* liquid crystals with six-layer periodicity appearing between the ferroelectric and antiferroelectric chiral smectic phases.
abstract: We found a subphase with a six-layer periodicity which appears between the ferroelectric SmC(*) and the antiferroelectric SmC(A)(*)(q(T) = 0) phases. The six-layer periodic structure is directly determined by the microbeam resonant x-ray scattering measurement. Furthermore, considering the dielectric constants, this phase was found to be ferrielectric, assigned as SmC(A)(*)(q(T) = 2/3). This subphase indicates the importance of the competition between the ferro- and the antiferroelectric phases and, in that point, it is essentially different from the previously observed six-layer phase. The relation between current theories and our present experimental results has been studied and discussed.
authors.affiliation: Department of Physics, Kyoto University, Kyoto 606-8502, Japan.
authors.forename: Yoichi
authors.initials: Y
authors.lastname: Takanishi
authors.forename: Isa
authors.initials: I
authors.lastname: Nishiyama
authors.forename: Jun
authors.initials: J
authors.lastname: Yamamoto
authors.forename: Youko
authors.initials: Y
authors.lastname: Ohtsuka
authors.forename: Atsuo
authors.initials: A
authors.lastname: Iida
mesh_terms: D016880:Anisotropy; D003198:Computer Simulation; D017097:Electric Impedance; D050866:Liquid Crystals / Q000737:chemistry*; D060526:Magnetic Fields; D008956:Models, Chemical; D008958:Models, Molecular; D009991:Oscillometry / Q000379:methods*