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Home  >  Journal list  >  MATERIALS TRANSACTIONS  >  Vol.46  No.8 (2005)  >  pp.1807-1809

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Isotopic Effect on Thermal Conductivity of Diamond Thin Films

Tetsuji Noda1), Hiroshi Araki1), Hiroshi Suzuki1), Wen Yang1) and Takefumi Ishikura2)
1) National Institute for Materials Science
2) Tokyo Gas Co., Ltd.

The thermal conductivities of 99.95%12C and natural diamond films at temperatures from 1.5 to 300 K were studied. The thermal conductivity was measured by a steady heat-flow method. The thermal conductivity of 12C enriched diamond was increased compared to that of natural isotope abundant diamond. Its maximum value was about 1.4 times higher than that of the natural isotope-abundant diamond at around 180 K. The increase in thermal conductivity for the isotope diamond can be explained by Callaway’s model, that is, by lowering the isotope-scattering effect.

thermal conductivity, diamond film, isotope scattering, Callaway model

Received: March 31, 2005
Accepted: June 08, 2005 , Published online: November 14, 2005
Copyright (c) 2005 The Japan Institute of Metals



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