Publication: Absolute Measurement of the Critical Properties of Second Sound at the Smectic-A-to-Nematic Phase Transition in 8OCB
Open/View Files
Date
1981
Published Version
Journal Title
Journal ISSN
Volume Title
Publisher
American Physical Society
The Harvard community has made this article openly available. Please share how this access benefits you.
Citation
Fisch, M. R., L. B. Sorensen, and Peter S. Pershan. 1981. Absolute measurement of the critical properties of second sound at the smectic-A-to-nematic phase transition in 8OCB. Physical Review Letters 47(1): 43–46.
Research Data
Abstract
Light scattered from the driven free surface of the smectic-A phase of octyloxy cyanobiphenyl (8OCB) provides a low-frequency measurement of second sound. This yields an absolute measurement of the smectic elastic constant, B. There is no dispersion in either the angular or frequency dependence of B for angles \(35^{\circ}-83^{\circ}\) from the normal and for frequencies from 10-100 kHz. Near the smectic-A-to-nematic phase transition the smectic elastic constant can be described by \(B=(6.03 \pm 0.05) \times 10^7 (T_{NA}-T)^{0.32 \pm 0.015} dyn/cm^2\).
Description
Other Available Sources
Keywords
Terms of Use
This article is made available under the terms and conditions applicable to Other Posted Material (LAA), as set forth at Terms of Service