Electroclinic effect in the chiral smectic A and cholesteric phases at the proximity of a N*–SmA–SmC* multicritical point

2010 ◽  
Vol 37 (10) ◽  
pp. 1313-1319 ◽  
Author(s):  
J. Hemine ◽  
A. Daoudi ◽  
C. Legrand ◽  
A. El Kaaouachi ◽  
A. Nafidi ◽  
...  
Keyword(s):  
Multicritical Point ◽  
Smectic A

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

THE NEMATIC-SMECTIC-A-SMECTIC-C MULTICRITICAL POINT IN BINARY LIQUID-CRYSTAL MIXTURES

1990 ◽  
Vol 04 (13) ◽  
pp. 841-845
Author(s):  
RUOZI QIU ◽  
JOHN T. HO
Keyword(s):  
Liquid Crystal ◽  
Light Scattering ◽  
Static Light Scattering ◽  
Multicritical Point ◽  
X Ray ◽  
Quasielastic Light Scattering ◽  
Binary Liquid ◽  
Smectic A ◽  
Smectic C ◽  
X Ray Scattering

Properties near the nematic-smectic-A-smectic-C multicritical point present in binary liquid-crystal mixtures are reviewed. Recent dynamic Fréedericksz deformation and quasielastic light-scattering results are described and their relationship with data from X-ray scattering and static light scattering is discussed.

Adiabatic calorimetry measurements in the vicinity of the nematic-smectic A-smectic C multicritical point

1985 ◽  
Vol 46 (12) ◽  
pp. 2137-2143 ◽  
Author(s):  
M.A. Anisimov ◽  
V.P. Voronov ◽  
A.O. Kulkov ◽  
F. Kholmurodov
Keyword(s):  
Adiabatic Calorimetry ◽  
Multicritical Point ◽  
Smectic A ◽  
Smectic C

High Pressure Studies of Liquid Crystalline Transitions

1983 ◽  
Vol 22 ◽  
Author(s):  
R. Shashidhar
Keyword(s):  
High Pressure ◽  
Liquid Crystal ◽  
Liquid Crystals ◽  
Nematic Phase ◽  
Liquid Crystalline ◽  
Maximum Pressure ◽  
Multicritical Point ◽  
Smectic A ◽  
High Pressure Studies ◽  
Molecular Ordering

ABSTRACTSome of the important results emerging from our recent investigations on liquid crystals at high pressure are presented. In particular the following topics will be discussed: i) The relation between Pm, the maximum pressure of smectic stability, and the temperature range of the nematic phase in reentrant nematogenic compounds. ii) Piezothermal studies in the vicinity of the smectic A-nematic transition in 8 OCB. iii) The effect of molecular ordering on the pressure behaviour of the nematic-isotropic transition in reentrant nematic mixtures. iv) The first observation of a multicritical point in a single component liquid crystal.

Freeze-fracture TEM of the helical smectic A* phase

1992 ◽  
Vol 50 (1) ◽  
pp. 278-279
Author(s):  
K.J. Ihn ◽  
R. Pindak ◽  
J. A. N. Zasadzinski
Keyword(s):  
Liquid Crystal ◽  
Grain Boundary ◽  
Grain Boundaries ◽  
Freeze Fracture ◽  
Smectic Phase ◽  
Layer Spacing ◽  
Screw Dislocations ◽  
Smectic A ◽  
Smectic Phases ◽  
Discrete Amount

A new liquid crystal (called the smectic-A* phase) that combines cholesteric twist and smectic layering was a surprise as smectic phases preclude twist distortions. However, the twist grain boundary (TGB) model of Renn and Lubensky predicted a defect-mediated smectic phase that incorporates cholesteric twist by a lattice of screw dislocations. The TGB model for the liquid crystal analog of the Abrikosov phase of superconductors consists of regularly spaced grain boundaries of screw dislocations, parallel to each other within the grain boundary, but rotated by a fixed angle with respect to adjacent grain boundaries. The dislocations divide the layers into blocks which rotate by a discrete amount, Δθ, given by the ratio of the layer spacing, d, to the distance between grain boundaries, lb; Δθ ≈ d/lb (Fig. 1).

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