title: Tricritical behavior of the nematic to smectic-A phase transition in the binary mixture of liquid crystal.
abstract: We propose a phenomenological model to describe the tricritical behavior of the nematic to smectic-A (N-SmA) phase transition in liquid crystal mixture. To describe the mesophase transitions in binary mixture, nematic and smectic order parameters have been coupled with the concentration. We show that a tricritical point on the N-SmA phase transition line can be achieved under certain conditions. The predictive capability of the present model for determining the tricritical point of a binary mixture displaying the N-SmA transition has been demonstrated by testing with reported phase diagrams sharing both phases.
authors.affiliation: Department of Physics, Government College of Engineering and Textile Technology, 12 William Carey Road, Serampore, Hooghly-712201, India. pkmuk1966@gmail.com
authors.forename: Prabir K
authors.initials: PK
authors.lastname: Mukherjee
authors.forename: Josep Ll
authors.initials: JL
authors.lastname: Tamarit