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T-3 temperature dependence and a length scale for the thermal boundary resistance between a saturated dilute 3He-4He solution and sintered silver

Research output: Contribution to journalJournal article


<mark>Journal publication date</mark>7/11/1994
<mark>Journal</mark>Physical review letters
Number of pages4
<mark>Original language</mark>English


We have measured the thermal boundary resistance between various configurations of sintered silver and a saturated He-3-He-4 solution between 8 and 150 mK. We observe that there is a length scale involved in the heat flow between sinter and liquid, which manifests itself as a thickness-dependent crossover from a T--1.5 dependence of the resistance at high temperatures to a T-3 behavior at low temperatures. This allows us to extract the Kapitza boundary resistance which we find to vary as T-3, as expected from simple theory, and not as T-2 as suggested by most recent measurements.