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The Measurement of Thermal Conductivity of Ag/Al Multilayered Films

Published online by Cambridge University Press:  15 February 2011

Takeshi Kaizuka ,
We-Hyo Soe ,
Ryoichi Yamamoto  and
Masanori Ohyama
Takeshi Kaizuka
Affiliation:
University of Tokyo, Research Center for Advanced Science and Technology, 4–6-1 Komoba, Meguro-ku, Tokyo 153, Japan
We-Hyo Soe
Affiliation:
University of Tokyo, Research Center for Advanced Science and Technology, 4–6-1 Komoba, Meguro-ku, Tokyo 153, Japan
Ryoichi Yamamoto
Affiliation:
University of Tokyo, Research Center for Advanced Science and Technology, 4–6-1 Komoba, Meguro-ku, Tokyo 153, Japan
Masanori Ohyama
Affiliation:
Tokyo National College of Technology, 1220-2 Kunugidamachi, Hachioji, Tokyo 193, Japan
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Abstract

The in-plane thermal conductivity of Ag/Al multilayered films was measured at room temperature by ac calorimetric method as a function of the modulation wavelength and was compared with the electrical conductivity. The electrical conductivity increases with wavelength, Λ, like other metallic multilayered films. The thermal conductivity also tends to increase with Λ, but the Λ dependence is not similar to that of electrical conductivity. Obtained Lorentz number value of the multilayers are almost 10–30% larger than that given by the free electron theory. The Wiedemann-Franz law did not hold in the Ag/Al films and the phonon contribution is not negligible.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 229: Symposium Q – Structure/Property Relationships for Metal/Metal Interfaces , 1991 , 147
Copyright
Copyright © Materials Research Society 1991

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