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Journal of Low Temperature Physics

, Volume 105, Issue 1–2, pp 185–209 | Cite as

Thermal boundary resistance in superfluid4He nearTλ

  • Daniel Murphy
  • Horst Meyer
Articles

Abstract

New measurements of the boundary resistivity in superfluid4He (2ppb3He) nearTλ are reported as a function of ¦ɛ¦ (ɛ =T/Tλ(Q) — 1) and of heat flux Q in a cell with parallel polished copper surfaces. Here we call Tλ(Q) the temperature where the superfluid state abruptly disappears. In this design, the sidewall gaps between the copper pieces and the stainless steel spacer were eliminated. In contrast to several previous experiments but in agreement with those of Li and Lip a, no largeQ-dependent boundary resistivity anomaly was detected. However, as ¦ɛ¦ → 0 the small weakly divergent resistivity was observed and its dependence onQ over the experimental range 1 <Q < 80 μW/cm2 was found to be very small. These new results are compared with previous experiments and predictions. An explanation of the previously observed anomalous transport phenomena is presented in terms of a heat flow through the sidewall gaps in these cells, and its limitation by a critical flow value Φc. This phenomenological model can be fit satisfactorily to the observations. In the appendix we calculate Φc from mutual friction.

Keywords

Stainless Steel Heat Flux Previous Experiment Heat Flow Transport Phenomenon 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Plenum Publishing Corporation 1996

Authors and Affiliations

  • Daniel Murphy
    • 1
  • Horst Meyer
    • 1
  1. 1.Department of PhysicsDuke UniversityDurhamUSA

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