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Nd$_{2-x}$Ce$_x$CuO$_{4\pm\delta}$ (NCCO) epitaxial thin films have beendeposited on (100) SrTiO$_3$ substrates by DC sputtering technique in differentatmosphere. The as-grown samples show different dependence of the in-planeresistivity at low temperature, when they are grown in pure argon atmosphere orin oxygen. Moreover, an unusual behaviour is also found when transport takesplace in the presence of an external magnetic field. It is commonly acceptedthat the higher anisotropic properties of NCCO crystalline cell with respect tothe hole doped YBCO and LSCO and the electric conduction mainly confined in theCuO$_2$ plane, strongly support the two-dimensional (2D) character of thecurrent transport in this system. Results on the temperature dependence of theresistance, as well as on the magnetoresistance and the Hall coefficient,obtained on epitaxial NCCO thin films in the over-doped region ($x\ge0.15$) ofthe phase diagram are presented and discussed.

Magneto-transport measurements on Nd$_{1.83}$Ce$_{0.17}$CuO$_{4\pm\delta}$ thin films