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PHYSICAL REVIEW E
Volume 86, Issue 6, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevE.86.061704
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We carried out an improved characterization of phase transitions among chiral smectic-C subphases observed for various antiferroelectric liquid crystals by precise heat capacity measurements. It was found that the phase transitions are intrinsically first order exhibiting a remarkable heat anomaly which involves little pretransitional thermal fluctuation and a finite thermal hysteresis. On the other hand, we also noticed that the critical point of the smectic-C*(alpha)-smectic-C* transition is induced by the destabilization of the smectic-C*(alpha) phase which couples with the fluctuation associated with the smectic-A-smectic-C*(alpha) phase transition. DOI: 10.1103/PhysRevE.86.061704
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