Abstract
High-resolution ac calorimetry measurements have been performed on a liquid-crystal material exhibiting a stacked-hexatic-Bsmectic-A phase transition. The transition appears to be second order with a pronounced, symmetric heat capacity peak and no observable thermal hysteresis. The data can be fitted by a power law divergence with critical exponents ==0.640.04 and a ratio of critical amplitudes AA=0.83. Measurements have also been carried out on a crystalline-B-smectic-A transition which is found to be first order.
Original language | English (US) |
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Pages (from-to) | 1289-1292 |
Number of pages | 4 |
Journal | Physical review letters |
Volume | 46 |
Issue number | 19 |
DOIs | |
State | Published - 1981 |