New High Frequency Dielectric Mode in Fluorinated Antiferroelecteric Liquid Crystals
Autor: | Jolanta Rutkowska, Wiktor Piecek, Magdalena Zurowska, Xiao Wei Sun, K. Ogrodnik, Roman Dabrowski, Jerzy Kedzierski, Paweł Perkowski, Zbigniew Raszewski |
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Rok vydání: | 2008 |
Předmět: | |
Zdroj: | Ferroelectrics. 365:88-94 |
ISSN: | 1563-5112 0015-0193 |
DOI: | 10.1080/00150190802063666 |
Popis: | 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. |
Databáze: | OpenAIRE |
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