About cookies on this site Our websites require some cookies to function properly (required). In addition, other cookies may be used with your consent to analyze site usage, improve the user experience and for advertising. For more information, please review your options. By visiting our website, you agree to our processing of information as described in IBM’sprivacy statement. To provide a smooth navigation, your cookie preferences will be shared across the IBM web domains listed here.
Publication
Ferroelectrics
Paper
The strong temperature dependent goldstone mode relaxation frequency in a broad range smc* phase
Abstract
Broad frequency range dielectric spectroscopy, X-ray diffraction, electro-optical methods and thermal analysis are used to characterize a single component liquid crystal with a monotropic broad range room temperature ferroelectric SmC* phase. The dielectric spectrum shows a Soft mode and a Goldstone mode. Unlike in other ferroelectric liquid crystals the Goldstone mode of this substance has a strongly temperature dependent characteristic frequency. It is proposed that glassy-state fluctuations are responsible for the appreciable increase of activation energy (from 37 to 91 kJ/mol) upon cooling from 318 K (TCA) to 278 K. Beside these modes a Domain mode is detected. Measurements in the high frequency range 1 MHz to 450 GHz show an additional relaxation process. © 1991, Taylor & Francis Group, LLC. All rights reserved.