ELLIPSOMETRIC STUDY OF FREESTANDING FILMS OF A LIQUID-CRYSTAL POSSESSING FERROELECTRIC, FERRIELECTRIC, AND ANTIFERROELECTRIC PHASES

被引：21

作者：

BAHR, C ^{[1
]}

FLIEGNER, D ^{[1
]}

BOOTH, CJ ^{[1
]}

GOODBY, JW ^{[1
]}

机构：

[1] UNIV HULL,SCH CHEM,KINGSTON HULL HU6 7RX,N HUMBERSIDE,ENGLAND

来源：

EUROPHYSICS LETTERS | 1994年 / 26卷 / 07期

关键词：

D O I：

10.1209/0295-5075/26/7/011

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present an ellipsometric study of free-standing films of a chiral smectic liquid crystal possessing the phase sequence smectic-A-smectic-C(alpha)-smectic-C-smectic-C(gamma)-smectic-C(A). The various subphases of the conventional smectic-C phase, which are assumed to have different structures concerning the direction of the molecular tilt in the neighbouring smectic layers, still exist in thin films consisting of only five molecular layers. In the smectic-C(alpha) phase, in thick films structural changes occur which are not present in films thinner than - 15 layers. With the exception of the smectic-C(gamma)-smectic-C(A) transition, all transition temperatures increase with decreasing film thickness.

引用

页码：539 / 544

页数：6

共 22 条

[1] LIGHT-SCATTERING AND ELLIPSOMETRY STUDIES OF THE 2-DIMENSIONAL SMECTIC-C TO SMECTIC-A TRANSITION IN THIN LIQUID-CRYSTAL FILMS [J].

AMADOR, SM ;

PERSHAN, PS .

PHYSICAL REVIEW A, 1990, 41 (08) :4326-4334

[2] BEHAVIOR OF A 1ST-ORDER SMECTIC-A-SMECTIC-C TRANSITION IN FREESTANDING LIQUID-CRYSTAL FILMS [J].

BAHR, C ;

FLIEGNER, D .

PHYSICAL REVIEW A, 1992, 46 (12) :7657-7663

[3] FERROELECTRIC-ANTIFERROELECTRIC PHASE-TRANSITION IN A 2-MOLECULAR-LAYER FREESTANDING LIQUID-CRYSTAL FILM [J].

BAHR, C ;

FLIEGNER, D .

PHYSICAL REVIEW LETTERS, 1993, 70 (12) :1842-1845

[4] THE DEVILS STAIRCASE [J].

BAK, P .

PHYSICS TODAY, 1986, 39 (12) :38-45

[5]

CHANDANI ADL, 1989, JPN J APPL PHYS, V28

[6] SMECTIC-O FILMS [J].

GALERNE, Y ;

LIEBERT, L .

PHYSICAL REVIEW LETTERS, 1990, 64 (08) :906-909

[7] ANTIFERROELECTRIC CHIRAL SMECTIC-O-STAR LIQUID-CRYSTAL [J].

GALERNE, Y ;

LIEBERT, L .

PHYSICAL REVIEW LETTERS, 1991, 66 (22) :2891-2894

[8] MOLECULAR ORIENTATIONAL STRUCTURES IN FERROELECTRIC, FERRIELECTRIC AND ANTIFERROELECTRIC SMECTIC LIQUID-CRYSTAL PHASES AS STUDIED BY CONOSCOPE OBSERVATION [J].

GORECKA, E ;

CHANDANI, ADL ;

OUCHI, Y ;

TAKEZOE, H ;

FUKUDA, A .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, 1990, 29 (01) :131-137

[9]

HEINEKAMP S, 1984, PHYS REV LETT, V52, P1017, DOI 10.1103/PhysRevLett.52.1017

[10] OBSERVATION OF 3 SUBPHASES IN SMECTIC C-STAR OF MHPOBC BY DIELECTRIC MEASUREMENTS [J].

HIRAOKA, K ;

TAGUCHI, A ;

OUCHI, Y ;

TAKEZOE, H ;

FUKUDA, A .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS, 1990, 29 (01) :L103-L106

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