New high frequency dielectric mode in fluorinated Antiferroelecteric Liquid Crystals

作者：Perkowski P^*; Piecek W; Raszewski Z; Ogrodnik K; Rutkowska J; Zurowska M; Dabrowski R; Kedzierski J; Sun X

来源：Ferroelectrics, 2008, 365: 246-+.

DOI：10.1080/00150190802063666

• antiferroelectric liquid crystals
• dielectric properties
• relaxation frequency

The promising materials for applications are Antiferroelectric Liquid Crystals. Two dielectric modes were detected in AFLCs, as far [1, 2]. Low frequency mode called P-L with the relaxation frequency around 100 Hz as well as high frequency mode called P-H with the relaxation frequency around 100 kHz. The first (P-L) is related to in-phase motions of molecules on the cone surface (when two neighbouring layers are taken into account) while the second (P-H) is related to anti-phase motions of molecules on the cone surface. In recently synthesized fluorinated liquid crystals we detected new high frequency dielectric mode. We called it X-mode. Relaxation frequency is around 1-100 MHz and changes with the temperature.

• 出版日期2008
• 单位南阳理工学院