Dynamics near the nematic—smectic-A and nematic—smectic-C phase transitions in liquid crystals

1979 ◽  
Vol 19 (1) ◽  
pp. 432-440 ◽  
Author(s):  
Khurshid A. Hossain ◽  
J. Swift ◽  
Jing-Huei Chen ◽  
T. C. Lubensky
Keyword(s):  
Phase Transitions ◽  
Liquid Crystals ◽  
Smectic A ◽  
Smectic C ◽  
Transitions In Liquid Crystals

First Examples of de Vries-like Smectic A to Smectic C Phase Transitions in Ionic Liquid Crystals

ChemPhysChem ◽  
2016 ◽  
Vol 17 (24) ◽  
pp. 4116-4123 ◽  
Author(s):  
Nadia Kapernaum ◽  
Carsten Müller ◽  
Svenja Moors ◽  
M. Christian Schlick ◽  
Eugen Wuckert ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Phase Transitions ◽  
Liquid Crystals ◽  
Smectic A ◽  
Smectic C ◽  
De Vries ◽  
Ionic Liquid Crystals

A new theory of the nematic-smectic A-smectic C transition in liquid crystals

1987 ◽  
Vol 48 (8) ◽  
pp. 1241-1245 ◽  
Author(s):  
B.S. Andereck ◽  
B.R. Patton
Keyword(s):  
Liquid Crystals ◽  
Smectic A ◽  
Smectic C

HIGH RESOLUTION CALORIMETRIC STUDIES AT PHASE TRANSITIONS OF ALKYLCYANOBIPHENYL LIQUID CRYSTALS CONFINED TO SUBMICRON SIZE CYLINDRICAL CAVITIES

1995 ◽  
Vol 09 (18n19) ◽  
pp. 2247-2283 ◽  
Author(s):  
DANIELE FINOTELLO ◽  
GERMANO S. IANNACCHIONE
Keyword(s):  
Phase Transitions ◽  
Liquid Crystals ◽  
High Resolution ◽  
Specific Heat ◽  
Pore Wall ◽  
Isotropic Phase ◽  
First Order ◽  
Smectic A ◽  
Nematic Director ◽  
Scalar Order Parameter

We review results of a high resolution systematic study of the specific heat for alkyl-cyanobiphenyl liquid crystals confined to the 0.2µm diameter cylindrical pores Anopore membranes. The nematic director alignment at the pore wall is varied from homeotropic to tangential by pore surface treatment. Several phenomena are uncovered by these studies which probed the weakly first order nematic to isotropic, the continuous smectic-A to nematic and the first order smectic-A to isotropic phase transitions. The specific heat is strongly dependent on the nematic director configuration, and confinement effects are remarkably distinct according to the order of the phase transition. The influence of elastic distortions and surface ordering and disordering effects are evident. Despite considerable departures from bulk behavior with regards to specific heat peaks size, rounding and width, and transition temperature shifts, a bulk-like critical behavior appears to be retained. The formation of smectic translational order within the pores is hindered for those liquid crystals that also possess a nematic phase. The average scalar order parameter temperature dependence is extracted from the specific heat results using a simplified Landau-de Gennes type of model, and is shown to be consistent with nuclear magnetic resonance results.

scholarly journals Smectic-A–smectic-C–smectic-C*multicritical point in ferroelectric liquid crystals

1994 ◽  
Vol 72 (22) ◽  
pp. 3558-3561 ◽  
Author(s):  
Shankar B. Rananavare ◽  
V. G. K. M. Pisipati ◽  
E. W. Wong
Keyword(s):  
Liquid Crystals ◽  
Multicritical Point ◽  
Ferroelectric Liquid Crystals ◽  
Smectic A ◽  
Smectic C

Phase transitions between smectic A phases as well as smectic C* phases and undulated structures in terminal non-polar compounds

1995 ◽  
Vol 19 (5) ◽  
pp. 629-635 ◽  
Author(s):  
P. Göring ◽  
G. Pelzl ◽  
S. Diele ◽  
P. Delavier ◽  
K. Siemensmeyer ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Polar Compounds ◽  
Smectic A ◽  
Smectic C
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