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- W78250807 abstract "Published steady-state (dc) and second-sound (ac) measurements of the Kapitza resistance (RK) have differed in reports of the temperature dependence of RK. The two types of measurements were also seen to conflict on the measured effects of sample damage on the magnitude of RK. To resolve these differences, measurements of RK have been made using both techniques on the same sample, during the same experimental run. Our measurements, made on copper-liquid helium interfaces from 1.1 to 2.1 K, show excellent agreement between the dc and ac results. No evidence is seen for a frequency-dependent Kapitza resistance. Our measurements show an increase in RK when the sample is damaged, agreeing with published ac measurements, but disagreeing with published dc measurements. The temperature dependence of RK in our measurements is approximately T-3 from 1.5 to 2.1 K, in agreement with published dc measurements. A T-4 dependence has been seen in the published ac experiments. In our experiments, a T-4 dependence is observed only when second sound is coupled from the generating cavity to the helium bath." @default.
- W78250807 created "2016-06-24" @default.
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- W78250807 date "1980-01-01" @default.
- W78250807 modified "2023-09-25" @default.
- W78250807 title "Steady-state and second-sound measurements of Kapitza resistance" @default.
- W78250807 doi "https://doi.org/10.2172/5056354" @default.
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