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

Research output: Contribution to journalArticleAcademicpeer-review

3 Citations (Scopus)
10 Downloads (Pure)


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 languageEnglish
Pages (from-to)751-754
Number of pages4
JournalJournal of low temperature physics
Issue number3-4
Publication statusPublished - 1 Nov 1992
Externally publishedYes


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