Phase Transitions in Liquid Crystal Doped with Magnetic Particles of Different Shapes

被引：25

作者：

Kopcansky, P. ^{[1
]}

Tomasovicova, N. ^{[1
]}

Koneracka, M. ^{[1
]}

Timko, M. ^{[1
]}

Zavisova, V. ^{[1
]}

Dzarova, A. ^{[1
]}

Jadzyn, J. ^{[2
]}

Beaugnon, E. ^{[3
]}

Chaud, X. ^{[3
]}

机构：

[1] Slovak Acad Sci, Inst Expt Phys, Kosice 04353, Slovakia

[2] Polish Acad Sci, Inst Mol Phys, PL-60179 Poznan, Poland

[3] Ctr Natl Rech Sci, Grenoble High Magnet Field Lab, Grenoble, France

来源：

INTERNATIONAL JOURNAL OF THERMOPHYSICS | 2011年 / 32卷 / 04期

关键词：

Ferronematics; Liquid crystal; Magnetic particles; Phase transition; FERRONEMATICS; FIELD;

D O I：

10.1007/s10765-010-0781-1

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

In this study, observations of structural transitions in ferronematics based on the thermotropic nematic 4-trans-4'-n-hexyl-cyclohexyl-isothiocyanato-benzene (6CHBT) are described. Droplets of the nematic phase in the isotropic phase were observed in solutions of nematogenic 6CHBT dissolved in phenyl isocyanate and 6CHBT dissolved in phenyl isocyanate and doped with magnetic particles of different shapes (nanorods and chain-like particles). Magneto-dielectric measurements of structural transitions in these new systems enable to estimate of the type of anchoring of the nematic molecules on the magnetic particles surface.

引用

页码：807 / 817

页数：11

共 21 条

[1] DYNAMICS OF LYOTROPIC FERRONEMATIC LIQUID-CRYSTALS SUBMITTED TO MAGNETIC-FIELDS [J].

BACRI, JC ;

NETO, AMF .

PHYSICAL REVIEW E, 1994, 50 (05) :3860-3864

[2] THEORY OF MAGNETIC SUSPENSIONS IN LIQUID CRYSTALS [J].

BROCHARD, F ;

GENNES, PGD .

JOURNAL DE PHYSIQUE, 1970, 31 (07) :691-&

[3] Weak anchoring effects in ferronematic systems [J].

Burylov, SV ;

Zadorozhnii, VI ;

Pinkevich, IP ;

Reshetnyak, VY ;

Sluckin, TJ .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2002, 252 (1-3) :153-155

[4] MAGNETIC FREDERICKSZ TRANSITION IN A FERRONEMATIC [J].

BURYLOV, SV ;

RAIKHER, YL .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1993, 122 (1-3) :62-65

[5] ON THE ORIENTATION OF AN ANISOMETRIC PARTICLE SUSPENDED IN A BULK UNIFORM NEMATIC [J].

BURYLOV, SV ;

RAIKHER, YL .

PHYSICS LETTERS A, 1990, 149 (5-6) :279-283

[6] Macroscopic properties of ferronematics caused by orientational interactions on the particle surfaces .1. Extended continuum model [J].

Burylov, SV ;

Raikher, YL .

MOLECULAR CRYSTALS AND LIQUID CRYSTALS SCIENCE AND TECHNOLOGY SECTION A-MOLECULAR CRYSTALS AND LIQUID CRYSTALS, 1995, 258 :107-122

[7] 4- TRANS-4'-N-ALKYLCYCLOHEXYL ISOTHIOCYANATOBENZENES A NEW CLASS OF LOW-MELTING STABLE NEMATICS [J].

DABROWSKI, R ;

DZIADUSZEK, J ;

SZCZUCINSKI, T .

MOLECULAR CRYSTALS AND LIQUID CRYSTALS, 1984, 102 (05) :155-160

[8]

Gennes PGD, 1993, PHYS LIQUID CRYSTALS

[9] Quadrupolar particles in a nematic liquid crystal: Effects of particle size and shape [J].

Hung, Francisco R. .

PHYSICAL REVIEW E, 2009, 79 (02)

[10] Dynamics of the nonlinear dielectric properties of a nematogenic compound dissolved in a nonpolar medium [J].

Kedziora, P ;

Jadzyn, J ;

Hellemans, L .

PHYSICAL REVIEW E, 2002, 66 (02) :1-021709

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