Regensburg 2007 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 18: Electronic properties I

MM 18.4: Vortrag

Dienstag, 27. März 2007, 12:30–12:45, H6

Resistance and magnetoresistance of CuAg alloys — •Jens Freudenberger, Julia Lyubimova, Elias Mohn, Alexandre Gaganov, Nadezda Kozlova, and Ludwig Schultz — IFW Dresden, Institute for Metallic Materials

The resistance of cold worked Cu−x wt.-%Ag alloys (x=7 and x=24) is measured in dependence of magnetic field and temperature. The influence of impurities (such as vacancies, dislocations, second phases, precipitates, grain boundaries) as well as the size effect on the electrical conductivity of a Cu−7 wt.-%Ag−0.05 wt.-%Zr alloy wil be discussed. The magnetoresistance (MR) in the field range 0  T ≤ B ≤ 50  T is positive and increases with magnetic field. Whereas an increase of MR is found for I⊥ B, no significant change is observed for I∥ B.