2B06 強誘電性・反強誘電性液晶相転移II : J_3、J_<4b>の効果と中間相

概要

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In the course of certification of the ANNNI model with the third nearest neighbour interaction J_3 applied to the successive phase transitions occurring in the ferroelectric smectics the four body force J_<4b> is shown to be induced. The effects of J_3 and J_<4b> are studied and J_<4b> is shown not to be essential in the high temperature region in the ordered phases, which is applicable to the phase transitions concerned here. That means the first Hamiltonian is the effective Hamiltonian for these phenomena. The mesophases are studied where ferrielecric phase named as FI_L is suggested to have a wave number 2/5, and those FI_H and FI are assume to have the ones 2/7 and 1/5, respectively. The reasonwhy the mesophase FI is observed scarcely is also discussed on the basis of the phase diagrams.
日本液晶学会の論文
1996-09-30