Abstract
Phenomenological predictions for sound attenuation and velocity anomalies near critical points are presented. General symmetry properties of the linear elastic constants and the general properties of the low- and high-frequency behaviours of linear-response functions are used to develop phenomenological equations, where exponents, relaxation times and amplitudes are introduced as parameters to fit to the experimental data. Novel interpretation formulae, which combine the asymptotic high- and low-frequency limits of complex dynamic elastic constants, are constructed. It is shown that causality requirements give new relations between the amplitudes of ultrasonic attenuation and the velocity in the asymptotic limits of high and low frequency.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
