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Temperature Dependence of Dielectric Behaviour of MHPB(H)PBC Antiferroelectric Liquid Crystal.
- Source :
-
Molecular Crystals & Liquid Crystals . 2004, Vol. 414 Issue 1, p63-76. 14p. - Publication Year :
- 2004
-
Abstract
- Temperature dependence of dielectric behavior of antiferroelectric liquid crystal, MHPB(H)PBC, has been investigated in the frequency range of 1  Hz to 10  MHz. The experimental results have been analyzed using a generalized Cole–Cole expression. There is mainly one relaxation mechanism in SmA∗ phase, which behaves as soft mode. Two dielectric relaxation processes have been observed in SmCA∗ phase, one at about 50  kHz and the other at about 400  kHz. Dielectric strengths of both modes remain constant throughout the SmCA∗ phase, while relaxation frequencies of both modes decrease with decrease in temperature. These two observed modes have been assigned to the in-phase and antiphase azimuthal fluctuations of the director of molecules in the antitilt pairs. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 15421406
- Volume :
- 414
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Molecular Crystals & Liquid Crystals
- Publication Type :
- Academic Journal
- Accession number :
- 14303074
- Full Text :
- https://doi.org/10.1080/15421400490427548