Thermal and electrical properties of a suspended nanoscale thin film

X. Zhang, H. Q. Xie, M. Fujii, H. Ago, K. Takahashi, T. Ikuta, H. Abe, T. Shimizu

Research output: Contribution to journalArticle

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Abstract

This paper reports on measurements of in-plane thermal conductivities, electrical conductivities, and Lorentz number of two microfabricated, suspended, nanosized thin films with a thickness of 28 nm. The effect of the film thickness on the in-plane thermal conductivity is examined by measuring other nanofilm samples with a thickness of 40 nm. The experimental results show that the electrical conductivity, resistance-temperature coefficient, and in-plane thermal conductivity of the nanofilms are much smaller than the corresponding bulk values from 77 to 330 K. However, the Lorentz number of the nanofilms is about two times that of the bulk value at room temperature, and even up to three times that of the bulk value at 77 K. These results indicate that the relation between the thermal conductivity and electrical conductivity of the nanofilms does not follow the Wiedemann-Franz law for bulk metallic materials.

Original languageEnglish
Pages (from-to)33-43
Number of pages11
JournalInternational Journal of Thermophysics
Volume28
Issue number1
DOIs
Publication statusPublished - Feb 1 2007

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thermal conductivity
thermodynamic properties
electrical properties
thin films
electrical resistivity
film thickness
conductivity
room temperature
coefficients
temperature

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

Cite this

Thermal and electrical properties of a suspended nanoscale thin film. / Zhang, X.; Xie, H. Q.; Fujii, M.; Ago, H.; Takahashi, K.; Ikuta, T.; Abe, H.; Shimizu, T.

In: International Journal of Thermophysics, Vol. 28, No. 1, 01.02.2007, p. 33-43.

Research output: Contribution to journalArticle

Zhang, X. ; Xie, H. Q. ; Fujii, M. ; Ago, H. ; Takahashi, K. ; Ikuta, T. ; Abe, H. ; Shimizu, T. / Thermal and electrical properties of a suspended nanoscale thin film. In: International Journal of Thermophysics. 2007 ; Vol. 28, No. 1. pp. 33-43.
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AU - Abe, H.

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