Third sound in a restricted geometry

P. W. Brouwer; W. A. Draisma; P. W.H. Pinkse; H. van Beelen; R. Jochemsen; G. Frossati

doi:10.1007/BF00694133

Third sound in a restricted geometry

P. W. Brouwer^*, W. A. Draisma, P. W.H. Pinkse, H. van Beelen, R. Jochemsen, G. Frossati

^*Corresponding author for this work

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Abstract

Bergman's general treatment of third sound waves has been extended to a (restricted) parallel plate geometry. In a parallel plate geometry two independent third sound modes can propagate: a symmetric and an antisymmetric one. Calculations show that at temperatures below 1 K the antisymmetric mode carries the most important part of the temperature amplitude. Because of the relatively strong substrate influence the temperature amplitude of the symmetric mode is suppressed. The ΔT/Δh versus T measurements by Laheurte et al.¹ and of the ΔT/Δh versus ω measurements by Ellis et al.² are explained.

Original language	English
Pages (from-to)	751-754
Number of pages	4
Journal	Journal of low temperature physics
Volume	89
Issue number	3-4
DOIs	https://doi.org/10.1007/BF00694133
Publication status	Published - 1 Nov 1992
Externally published	Yes

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abstract = "Bergman's general treatment of third sound waves has been extended to a (restricted) parallel plate geometry. In a parallel plate geometry two independent third sound modes can propagate: a symmetric and an antisymmetric one. Calculations show that at temperatures below 1 K the antisymmetric mode carries the most important part of the temperature amplitude. Because of the relatively strong substrate influence the temperature amplitude of the symmetric mode is suppressed. The ΔT/Δh versus T measurements by Laheurte et al.1 and of the ΔT/Δh versus ω measurements by Ellis et al.2 are explained.",

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AU - Brouwer, P. W.

AU - Draisma, W. A.

AU - Pinkse, P. W.H.

AU - van Beelen, H.

AU - Jochemsen, R.

AU - Frossati, G.

PY - 1992/11/1

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AB - Bergman's general treatment of third sound waves has been extended to a (restricted) parallel plate geometry. In a parallel plate geometry two independent third sound modes can propagate: a symmetric and an antisymmetric one. Calculations show that at temperatures below 1 K the antisymmetric mode carries the most important part of the temperature amplitude. Because of the relatively strong substrate influence the temperature amplitude of the symmetric mode is suppressed. The ΔT/Δh versus T measurements by Laheurte et al.1 and of the ΔT/Δh versus ω measurements by Ellis et al.2 are explained.

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JO - Journal of low temperature physics

JF - Journal of low temperature physics

IS - 3-4

ER -

Third sound in a restricted geometry

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