Wed, January 24, 2018   Advanced Search

The Effect of Spin-Spin Interaction in the Region of Freedricksz Transition in Antiferroelectric Liquid Crystals

Tapas Pal Majumder, Pravash Mandal and Deblal Das

Department of Physics, University of Kalyani, Kalyani, Nadia 741235, West Bengal, INDIA.

ABSTRACT

We have studied the Freedericksz transition of antiferroelectric liquid crystals (PDAFLCs) utilizing Landau-Ginzburg (LG) equation. Low frequency in-phase mode and high frequency anti-phase mode in the region of Freedericksz transition influenced by the interactions between spin angular momentum and spin angular momentum of the accumulated charges on smectic layers have been discussed. Dielectric characteristics have been investigated in detail both in in-phase and anti-phase motions in the region of the Freedericksz transition in AFLCs influenced due to spin-spin interactions. We theoretically noticed the dielectric strength become negligibly small for in-phase motion and the dielectric strength become independent with spin because of strong spin-spin interactions of the accumulated charges on smectic layers in AFLCs.

Keywords : Antiferroelectric liquid crystal; Freedericksz transition; Dielectric function; Landau-Ginzburg equation; In-phase and anti-phase motions.