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We prepared high epitaxial thin films of the compound Sr_2FeMoO_6 with narrowrocking curves by pulsed laser deposition. The diagonal and nondiagonalelements of the resistivity tensor were investigated at temperatures from 4 Kup to room temperature in magnetic fields up to 8 T. An electronlike ordinaryHall effect and a holelike anomalous Hall contribution are observed. Bothcoefficients have reversed sign compared to the colossal magnetoresistivemanganites. We found at 300 K an ordinary Hall coefficent of -1.87x10^{-10}m^3/As, corresponding to a nominal charge carrier density of four electrons performula unit. At low temperature only a small negative magnetoresistance isobserved which vanishes at higher temperatures. The temperature coefficient ofthe resistivity is negative over the whole temperature range. A Kondo likebehavior is observed below 30 K while above 100 K variable range hopping liketransport occurs.Comment: 4 pages, 4 EPS figures, to appear in J. Appl. Phys. (MMM99  Proceedings

Hall effect of epitaxial double-perovskite Sr2FeMoO6 thin films