Nature of nematic-smectic-A phase transition in liquid crystals
Anisimov M. A.
The unusual behavior of thermodynamic quantities near an N-A transition is explained. The absence of a jump in the heat capacity for large widths of the nematic zone and the anomalously narrow width of the nematic zone corresponding to the tricritical point on the N-A transition curve are due to the weakness of the modulation of the density of the substance by the smectic "wave."
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![](/ps/1488/article_22704_800_head.png "The unusual behavior of thermodynamic quantities near an <i>N-A </i>transition is explained. The absence of a jump in the heat capacity for large widths of the nematic zone and the anomalously narrow width of the nematic zone corresponding to the tricritical point on the <i>N-A </i>transition curve are due to the weakness of the modulation of the density of the substance by the smectic "wave."")