Dielectric measurements of new antiferroelectric liquid crystals

被引：11
|
作者：
Perkowski, P. [1 ]
Ogrodnik, K. [1 ]
Lada, D. [1 ]
Piecek, W. [1 ]
Rutkowska, J. [1 ]
Raszewski, Z. [1 ]
Zurowska, M. [2 ]
Dabrowski, R. [2 ]
Sun, X. [3 ]
机构：
[1] Mil Univ Technol, Inst Appl Phys, PL-00908 Warsaw, Poland
[2] Mil Univ Technol, Inst Chem, PL-00908 Warsaw, Poland
[3] Nanyang Technol Univ, Singapore 639798, Singapore
来源：
OPTO-ELECTRONICS REVIEW | 2008年 / 16卷 / 03期
关键词：
relaxation modes; antiferroelectric liquid crystals; dielectric permittivity;
D O I：
10.2478/s11772-008-0013-4
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Three new pure antiferroelectric materials, synthesized at the Military University of Technology (MUT), were investigated by dielectric means. Clear relaxation modes were detected, i.e., Soft, Goldstone, low frequency in-phase (P-L) as well high frequency anti-phase (P-H) modes for paraelectric Sm A*phase, ferroelectric Sm C* phase and antiferroelectric Sm C-A* phase, respectively. Additionally, a high relaxation mode in Sm C-A* was found. The relaxation frequencies f(R) of the observed modes were calculated from Cole-Cole diagrams.
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页码：277 / 280
页数：4
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