Electronic Resource
Springer
Journal of low temperature physics
39 (1980), S. 119-130
ISSN:
1573-7357
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
This paper deals with measurements of the heat transfer coefficient between monocrystalline sapphire and lead as a function of the temperature between 2 and 80 K, the roughness of the interface, and an external magnetic field. The sapphire-lead junction was obtained by a melting process so that a close contact at the solid-solid interface was guaranteeed. The heat transfer coefficient was measured by a stationary method, and at the same time the thermal conductivity of sapphire and lead was determined. A brief description of the theoretical models for phonon heat transfer is given, and the measured results are discussed in terms of these models. For a sample with a polished interface, good agreement with acoustic mismatch model was found up to about 20 K. Interface roughness strongly influences the heat transfer, resulting in a reduction of the heat transfer coefficient. By applying an external magnetic field we measured the heat transfer coefficient for superconducting and normal-conducting lead.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00118069
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