Anisotropic Ultrasound Propagation in a Smectic-Liquid Crystal
- 22 October 1973
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 31 (17) , 1047-1050
- https://doi.org/10.1103/physrevlett.31.1047
Abstract
An anisotropic ultrasonic velocity in smectic- diethyl 4,4′-azoxydibenzoate was measured at 2, 5, 12, and 20 MHz. The material was aligned by slowly cooling through the phase transition point in a magnetic field of 12.4 kOe. An accuracy of ±0.08% in the relative velocity was provided by the phase-matching technique, and three elastic constants were calculated.
Keywords
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