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We have prepared iron microwires in a combination of focused electron beaminduced deposition (FEBID) and autocatalytic growth from the ironpentacarbonyl, Fe(CO)5, precursor gas under UHV conditions. The electricaltransport properties of the microwires were investigated and it was found thatthe temperature dependence of the longitudinal resistivity (rhoxx) shows atypical metallic behaviour with a room temperature value of about 88micro{\Omega} cm. In order to investigate the magnetotransport properties wehave measured the isothermal Hall-resistivities in the range between 4.2 K and260 K. From these measurements positive values for the ordinary and theanomalous Hall coefficients were derived. The relation between anomalous Hallresistivity (rhoAN) and longitudinal resistivity is quadratic, rhoAN rho^2 xx,revealing an intrinsic origin of the anomalous Hall effect. Finally, at lowtemperature in the transversal geometry a negative magnetoresistance of about0.2 % was measured.

Magnetotransport properties of iron microwires fabricated by focused electron beam induced autocatalytic growth