BRILLOUIN SCATTERING IN A FERROELECTRIC LIQUID CRYSTAL: A STUDY OF THE LIQUID - SMECTIC A - SMECTIC C* PHASE SEQUENCE

被引：1

作者：

Kuzel, P. ^{[1
]}

Dugautier, C. ^{[1
]}

Moch, P. ^{[1
]}

Pavel, M. ^{[2
]}

机构：

[1] Univ Paris 13, Inst Galilee, Lab PMTM, F-93430 Villetaneuse, France

[2] Acad Sci Czech Republ, Inst Phys, CZ-18040 Prague 8, Czech Republic

来源：

FERROELECTRICS | 1996年 / 185卷

关键词：

D O I：

10.1080/00150199608210483

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A Brillouin study of a liquid crystal in the temperature range covering a liquid - smectic A - smectic C* phase sequence has been performed. The effective elastic stiffnesses and the viscosities are derived in the frame of an hydrodynamic model which gives account of the observed anisotropies in the liquid-crystal phases. The anisotropy expected in the smectic phases which differentiates C-33 and C-13 from C-11, continuously develops below the liquid - Sm A transition temperature. Small anomalies in the variations of the stiffness constants at the smectic A - ferroelectric smectic C* transition are observed for the first time.

引用

页码：77 / 80

页数：4

共 9 条

[1]

de Gennes P. G., 1993, PHYS LIQUID CRYSTALS, P416

[2] BRILLOUIN-SCATTERING IN THE SMECTIC-A, NEMATIC AND ISOTROPIC PHASES OF 4'-N-OCTYLOXY-4-CYANOBIPHENYL (80CB) [J].

GLEED, DG ;

SAMBLES, JR ;

BRADBERRY, GW .

PHYSICS LETTERS A, 1989, 134 (07) :440-444

[3] UNIVERSAL RELAXATION BEHAVIOR OF CLASSICAL LIQUID-CRYSTALS AT HYPERSONIC FREQUENCIES [J].

GRAMMES, C ;

KRUGER, JK ;

BOHN, KP ;

BALLER, J ;

FISCHER, C ;

SCHORR, C ;

ROGEZ, D ;

ALNOT, P .

PHYSICAL REVIEW E, 1995, 51 (01) :430-440

[4] 2ND-ORDER ELASTICITY OF LIQUID-CRYSTALS WITHIN THEIR NEMATIC STATE AT HIGH-FREQUENCIES [J].

KRUGER, JK ;

GRAMMES, C ;

JIMENEZ, R ;

SCHREIBER, J ;

BOHN, KP ;

BALLER, J ;

FISCHER, C ;

ROGEZ, D ;

SCHORR, C ;

ALNOT, P .

PHYSICAL REVIEW E, 1995, 51 (03) :2115-2128

[5] BRILLOUIN-SCATTERING FROM SMECTIC LIQUID-CRYSTALS [J].

LIAO, Y ;

CLARK, NA ;

PERSHAN, PS .

PHYSICAL REVIEW LETTERS, 1973, 30 (14) :639-641

[6]

Miyano K., 1979, PHYSICAL ACOUSTICS P, V14, P93

[7]

Pavel J., 1988, FERROELECTRICS, V81, P413

[8] BRILLOUIN-SCATTERING IN NEMATIC AND ISOTROPIC PHASES OF A LIQUID-CRYSTAL [J].

VAUGHAN, JM .

PHYSICS LETTERS A, 1976, 58 (05) :325-328

[9] BRILLOUIN-SCATTERING IN THE ISOTROPIC, NEMATIC, AND SMECTIC-A PHASES OF P-CYANOBENZYLIDENE-P-N-OCTYLOXYLANILINE [J].

WERGIN, A ;

KRASSER, W ;

STILLER, HH ;

FRISCHKORN, CGB .

PHYSICAL REVIEW A, 1979, 20 (03) :1120-1124

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