A mean field model for liquid crystals near the NAC point

Özet

We present here a mean field model with two order parameters for a liquid system near the NAC point. Prom the most general form of the free energy, we calculate the tricritical exponents as $\beta$ = 1/4 for the order parameters, $\gamma$=1 for the susceptibility, and $\alpha$ = 1/2 for the specific heat for liquid crystals near the NAC point. Our results show that this mean field model describes correctly the tricritical behavior of a liquid crystal system near the NAC point.