Thermal boundary resistance (Rb) plays an important role in the design and performance of thin-film high-temperature superconducting devices, such as infrared detectors and optical switches, which rely upon the temperature rise of the film as the basis for their operation. Although there is general agreement on the magnitude of Rb from experimental data, there is at present no generally accepted theory capable of predicting Rb for these films, particularly at the intermediate cryogenic temperatures where they are likely to be used. Here, the Diffuse Mismatch Model (DMM), which considers that all phonons reaching the interface between the film and substrate scatter diffusely, is applied to the calculation of Rb. The results indicate that when employing the Debye model for the phonon density of states, the DMM yields results slightly more in agreement with data than the Acoustic Mismatch Model (AMM). Considering the measured phonon density of states, however, greatly increases Rb over that calculated assuming the Debye model, thus bringing the DMM results in relatively good agreement with the experimental data.
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Application of Diffuse Mismatch Theory to the Prediction of Thermal Boundary Resistance in Thin-Film High-Tc Superconductors
P. E. Phelan
P. E. Phelan
Department of Mechanical and Aerospace Engineering, Arizona State University, PO Box 876106, Tempe, AZ 85287-6106
e-mail: phelan@asu.edu
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P. E. Phelan
Department of Mechanical and Aerospace Engineering, Arizona State University, PO Box 876106, Tempe, AZ 85287-6106
e-mail: phelan@asu.edu
J. Heat Transfer. Feb 1998, 120(1): 37-43 (7 pages)
Published Online: February 1, 1998
Article history
Received:
February 28, 1997
Revised:
September 22, 1997
Online:
January 7, 2008
Citation
Phelan, P. E. (February 1, 1998). "Application of Diffuse Mismatch Theory to the Prediction of Thermal Boundary Resistance in Thin-Film High-Tc Superconductors." ASME. J. Heat Transfer. February 1998; 120(1): 37–43. https://doi.org/10.1115/1.2830060
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