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Picosecond optical studies of amorphous diamond and diamondlike carbon: Thermal conductivity and longitudinal sound velocity

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8 Author(s)
Morath, Christopher J. ; Department of Physics, Brown University, Providence, Rhode Island 02912 ; Maris, Humphrey J. ; Cuomo, Jerome J. ; Pappas, David L.
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A picosecond pump‐probe technique is used to measure the room‐temperature thermal conductivity κ and longitudinal sound velocity cl of amorphous diamond (a‐D) and diamondlike carbon (DLC) thin films. Both κ and cl were found to decrease with film hydrogen content. Depending on the film deposition technique, κ is in the range 5–10×10-2 W cm-1 K-1 for a‐D, and 3–10×10-3 W cm-1 K-1 for DLC. Values of cl were found to be in the range 14–18×105 cm s-1 for a‐D, and 6–9×105 cm s-1 for DLC.

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Journal of Applied Physics  (Volume:76 ,  Issue: 5 )