Title: Ferro- and Antiferroelectric Properties of Langmuir-Blodgett Films Composed of Mesogenic Bent-Core Molecules
Abstract: A bent-core mesogenic compound was used for preparation of thin solid Langmuir films (25–100 nm) that were transferred onto glass substrates and supplied with Al electrodes evaporated in vacuum. The Langmuir-Blodgett technique allowed us studying the thin polar films of the banana-shaped liquid crystal in sandwich geometry that keep amazing integrity on heating, even up to high-temperature B 2 phase, and show antiferroelectric and ferroelectric properties, which depend on film thickness. The magnitude of the measured switched polarization (400 nC/cm 2 ) is similar to that of the bulk material. The strong confinement of film results in high coercive field which reaches the value of 10 8 V/m for the thinnest film. The investigations of dielectric properties are reported. Keywords: Langmuir-Boldgett filmferroelectricsantiferroelectricsliquid crystalsPACS: 61.30.Gd64.70.Md77.80.Bh77.84.Nh77.55.+f Acknowledgments The study was supported by the Russian Fund for Basic Research (grants no. 0302-17288, 0402-16466 and 05-02-16703) and the program “New Materials and Structures” of Russian Academy of Sciences. L.M. Blinov acknowledges the financial support from the chemif fund (Calabria University).
Publication Year: 2006
Publication Date: 2006-12-01
Language: en
Type: article
Indexed In: ['crossref']
Access and Citation
Cited By Count: 12
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot