On the sound propagation in silica aerogels filled in by normal and superfluid helium (in English)
Abstract
Earlier obtained experimental data concerning sound propagation in silica aerogels filled in by liquid 4He are theoretically analyzed for normal as well as superfluid phase. The simple phenomenological model is proposed for normal phase. The data for superfluid phase are described in a rather good manner by the hydrodynamic theory with taking into account the clamping of normal component by silica strands. It is shown also that at temperatures below 1 K one needs a new hydrodynamic theory in which momentum transfer between aerogel and phonons in liquid helium should be taken into account
Supporting agencies: This work was partially support by the grants from “Universities of Russia”
About the Authors
D. A. Tayurskii
Kazan State University; Kanazawa University
Russian Federation
Russian Federation
420008 Kazan; Kanazawa, 920-1192, Japan
K. Matsumoto
Kanazawa University
Japan
Japan
Kanazawa, 920-1192
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Review
For citations:
Tayurskii D.A., Matsumoto K. On the sound propagation in silica aerogels filled in by normal and superfluid helium (in English). Magnetic Resonance in Solids. 2004;6(1):213-220.
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