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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.

 

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