화학공학소재연구정보센터
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals, Vol.301, 437-447, 1997
Freedericksz Transition in a Planar Nematic Cell and the Surfacelike Elastic-Constant Problem
On the basis of local stability analysis we have studied how the splay-bend term, that is known as the K-13-term, influences Freedericksz transition in a nematic liquid crystal (NLC) sandwiched between two parallel plates. Two cases are considered : (a) the homeotropic anchoring is favored at both walls and magnetic field is assumed to be parallel to the confining surfaces; (b) the boundary conditions are planar and the magnetic held is normal to the walls. Under certain conditions it is found that the splay-bend term can change the order of the Freedericksz transition. In particular, we encounter the bistability induced by the term.