Photothermal and micro-thermal characterization of metal coated diamond crystallites
Instituto de Física de la Universidad de Guanajuato, IFUG, Apdo. E-143 León, Gto., Mexico
2 Institut für Experimentalphysik, Ruhr-Universitat, 44801 Bochum, Germany
3 ARC Seibersdorf Research, Dept. Materials Research, 2444 Seibersdorf, Austria
4 LTP, UTAP, Université de Reims, BP. 1039, 51687 Reims Cedex 2, France
Photoacoustic effect and scanning near field microscopy have been applied to characterise the thermal properties of diamond crystallites which were coated by a Cu film, a Cr-film and a Cr-Cu film. The Cu-coated diamond exhibits a considerable thermal barrier at the Cu-diamond interface which had disappeared for the crystallites with a thin bond Cr-layer between diamond and Cu. The local inspection of the thermal conductivity with a thermal nano-probe operated in the 3ω-mode reveals slight local variations of the thermal conductivity of the Cr-coated crystallite.
© EDP Sciences, Springer-Verlag, 2008