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MM: Fachverband Metall- und Materialphysik

MM 23: Poster session

MM 23.42: Poster

Dienstag, 26. Februar 2008, 14:45–18:00, Poster B

Electronic transport properties of nanocomposite materials prepared by electron and ion beam induced deposition — •Christina Grimm, Dirk Klingenberger, Harald Drings, and Michael Huth — Physikalisches Institut, Goethe-Universität, D-60438 Frankfurt am Main, Germany

A survey is given of the electronic transport properties of tungsten-based nanocomposite materials prepared with electron (EBID) or ion (IBID) beam induced deposition employing W(CO)₆ as precursor. The samples are analyzed in the normal state with regard to temperature-dependent electron correlation corrections to the Drude conductivity. A √T-dependence of the electrical conductivity was found for the first time in samples prepared by EBID. IBID samples with metal content approaching 50% show superconducting transitions at approx. 5 K. The properties of these samples are analyzed on the basis of the transport theory of Josephson-coupled networks. Finally, recent results on employing these materials for sensor applications are presented.