Characterization of Metal Coated Diamond Crystallites by Combined Photoacoustic Effect and Photothermal Radiometry
I. Delgadillo-Holtfort a, J. Gibkes b, M. Chirtoc c, E. Neubauer d, B.K. Bein b and J. Pelzl b
a Instituto de Física de la Universidad de Guanajuato, IFUG, Apdo. E-143 León, Gto., Mexico
b Institut für Experimentalphysik, Ruhr-Universität, D-44801 Bochum, Germany
c LTP, UTAP, Université de Reims, BP 1039, 51687 Reims Cedex 2, France
d ARC Seibersdorf Research, Dept. Materials Research, A-2444 Seibersdorf, Austria
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Photoacoustic effect and photothermal radiometry were 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 comparison of the responses of both measurement techniques reveals the non-negligible influence of the optical absorption in the visible and IR on the deduced thermal parameters.
DOI: 10.12693/APhysPolA.114.A-57
PACS numbers: 82.47.Pm, 43.35.Ud, 78.20.Nv, 65.40.-b, 66.70.+f