Isotopic Effect on Thermal Conductivity of Diamond Thin Films

Tetsuji Noda; Hiroshi Araki; Hiroshi Suzuki; Wen Yang; Takefumi Ishikura

doi:10.2320/matertrans.46.1807

MATERIALS TRANSACTIONS

Online ISSN : 1347-5320
Print ISSN : 1345-9678
ISSN-L : 1345-9678

Isotopic Effect on Thermal Conductivity of Diamond Thin Films

Tetsuji Noda, Hiroshi Araki, Hiroshi Suzuki, Wen Yang, Takefumi Ishikura

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Keywords: thermal conductivity, diamond film, isotope scattering, Callaway model

JOURNAL FREE ACCESS

2005 Volume 46 Issue 8 Pages 1807-1809

DOI https://doi.org/10.2320/matertrans.46.1807

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Abstract

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.

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