Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1816018 | Physica B: Condensed Matter | 2007 | 6 Pages |
Abstract
Structural (helical pitch), electro-optical (tilt angle, spontaneous polarization and response time) and dielectric (Goldstone mode) characterizations have been performed on two pure ferroelectric liquid crystals of a biphenyl alkyloxy benzoate series and they show the N*-SmA*-SmC* phase sequence. The different results are discussed: the helical pitch, the spontaneous polarization and the rotational viscosity which is determined as a function of temperature by two methods using electro-optical or dielectric measurements. An Arrhenius behaviour of the rotational viscosity is found for the two compounds. The corresponding activation energies are determined.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
J. Hemine, C. Legrand, N. Isaert, A. El Kaaouachi, H.T. Nguyen,