High-resolution calorimetric study of phase transitions in chiral smectic-C liquid crystalline phases

Y. Sasaki; K. V. Le; S. Aya; M. Isobe; H. Yao; C. C. Huang; H. Takezoe; K. Ema

doi:10.1103/PhysRevE.86.061704

High-resolution calorimetric study of phase transitions in chiral smectic-C liquid crystalline phases

Y. Sasaki, K. V. Le, S. Aya, M. Isobe, H. Yao, C. C. Huang, H. Takezoe, K. Ema

Physics and Astronomy (Twin Cities)

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Abstract

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-Cα*-smectic-C^* transition is induced by the destabilization of the smectic-Cα* phase which couples with the fluctuation associated with the smectic-A-smectic-Cα* phase transition.

Original language	English (US)
Article number	061704
Journal	Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
Volume	86
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevE.86.061704
State	Published - Dec 28 2012

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10.1103/PhysRevE.86.061704

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abstract = "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-Cα*-smectic-C* transition is induced by the destabilization of the smectic-Cα* phase which couples with the fluctuation associated with the smectic-A-smectic-Cα* phase transition.",

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AU - Sasaki, Y.

AU - Le, K. V.

AU - Aya, S.

AU - Isobe, M.

AU - Yao, H.

AU - Huang, C. C.

AU - Takezoe, H.

AU - Ema, K.

PY - 2012/12/28

Y1 - 2012/12/28

N2 - 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-Cα*-smectic-C* transition is induced by the destabilization of the smectic-Cα* phase which couples with the fluctuation associated with the smectic-A-smectic-Cα* phase transition.

AB - 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-Cα*-smectic-C* transition is induced by the destabilization of the smectic-Cα* phase which couples with the fluctuation associated with the smectic-A-smectic-Cα* phase transition.

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High-resolution calorimetric study of phase transitions in chiral smectic-C liquid crystalline phases

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