Magnetic field effect on the thresholds of a sequence of transitions in the electroconvection of a homeotropic nematic liquid crystal -: art. no. 036213

被引：16

作者：

Éber, N

Németh, S

Rossberg, AG

Kramer, L

Buka, A

机构：

[1] Hungarian Acad Sci, Res Inst solid State Phys & Opt, H-1525 Budapest, Hungary

[2] Univ Freiburg, Inst Datenanal & Modellbildung, D-79104 Freiburg, Germany

[3] Univ Bayreuth, Inst Phys, D-95440 Bayreuth, Germany

来源：

PHYSICAL REVIEW E | 2002年 / 66卷 / 03期

关键词：

D O I：

10.1103/PhysRevE.66.036213

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

We present a detailed analysis of the characteristics of electroconvection patterns in a homeotropic nematic liquid crystal under the influence of a variable magnetic field. An unambiguous observation of low frequency "reentrant" normal rolls and a nonmonotonic magnetic field dependence of the threshold voltages is reported. The effect of the magnetic field on the normal roll-abnormal roll transition is determined, which is in good agreement with theoretical predictions of the weakly nonlinear analysis.

引用

页数：8

共 36 条

[1] ON ELECTRICALLY DRIVEN PATTERN-FORMING INSTABILITIES IN PLANAR NEMATICS [J].

BODENSCHATZ, E ;

ZIMMERMANN, W ;

KRAMER, L .

JOURNAL DE PHYSIQUE, 1988, 49 (11) :1875-1899

[2] Electroconvection in homeotropically aligned nematics [J].

Buka, A ;

Tóth, P ;

Éber, N ;

Kramer, L .

PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 2000, 337 (1-2) :157-169

[3]

Chandrasekhar S., 1992, LIQUID CRYSTALS

[4] 4-WAVE RESONANCE IN ELECTROHYDRODYNAMIC CONVECTION [J].

JUAREZ, MD ;

REHBERG, I .

PHYSICAL REVIEW A, 1990, 42 (04) :2096-2100

[5]

DEGENNES PG, 1974, PHYSICS LIQUID CRYST

[6]

DENNIN M, 1995, THESIS U SANTA BARBA

[7] New scenarios in the electroconvection of a homeotropic nematic liquid crystal [J].

Éber, N ;

Rossberg, A ;

Buka, A ;

Kramer, L .

MOLECULAR CRYSTALS AND LIQUID CRYSTALS, 2000, 351 :161-168

[8] Dendritic growth of electrohydrodynamic convection in a nematic liquid crystal [J].

Gleeson, JT .

NATURE, 1997, 385 (6616) :511-513

[9]

HERTRICH A, 1992, J PHYS II, V2, P1915, DOI 10.1051/jp2:1992243

[10] Electrohydrodynamic convection with destabilizing magnetic field [J].

Hertrich, A ;

Pesch, W ;

Gleeson, JT .

EUROPHYSICS LETTERS, 1996, 34 (06) :417-422

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