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Comparison of steady-state and second-sound measurements of the Kapitza resistance

โœ Scribed by J. A. Katerberg; A. C. Anderson

Book ID
104627005
Publisher
Springer US
Year
1981
Tongue
English
Weight
615 KB
Volume
42
Category
Article
ISSN
0022-2291

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โœฆ Synopsis

The Kapitza thermal boundary resistance Rr has been measured using both the steady-state (dc) and the second-sound (ac) techniques on the same copper sample during the same low-temperature run. The two techniques give the same values for R~:; RK is therefore a constant for measuring [requencies ranging from dc to 600 Hz. We couM not reproduce the strong temperature dependence of Rr observed in earlier ac measurements unless both secondsound resonators were thermally coupled to the supe~uid helium bath.

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Measurements of the kapitza boundary resistance between copper and helium above the lambda transition
โœ Qiang Li; Talso C.P. Chui; John A. Lipa ๐Ÿ“‚ Article ๐Ÿ“… 1990 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 217 KB

Kapitza boundary resistance between copper and helium was measured above Th and found to be an order of magnitude smaller than the value previously proposed. Hence it is too small to explain the disagreement between thermal conductivity theory and some previous results.