Broadband dielectric relaxation study on a diluted solution of a ferroelectric liquid crystal by time domain reflectometry
作者:
W. Otowski,
R. Nozaki,
T.K. Bose,
期刊:
Liquid Crystals
(Taylor Available online 1993)
卷期:
Volume 14,
issue 4
页码: 1047-1053
ISSN:0267-8292
年代: 1993
DOI:10.1080/02678299308027812
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
In this work, complex permittivity measurements on a diluted solution of the ferroelectric liquid crystal, 4-[(S,S)-2,3-epoxyhexyloxy]-phenyl 4-(decyloxy)-benzoate, which shows ferroelectric smectic C phase (S*C), have been performed. Using time domain reflectometry, at frequencies between 10 MHz and 10 GHz, in the temperature range from 50°C down to 10°C for every 10°C, at 5, 10 and 30 wt.% in benzene we observe two independent relaxation processes around 150 MHz and 2 GHz. It is shown that the high frequency process is due to the internal molecular reorientations while the low frequency one is due to molecular orientation around the long molecular axis. It is concluded that the reorientation around the long axis is hindered and leads to a resultant macroscopic polarization.
点击下载:
PDF (354KB)
返 回