  The resistivity and the Hall effect in the copper-oxide high-temperature
superconductor YBa$_{2}$Cu$_{3}$O$_{7-\delta}$ (YBCO) are remarkably
anisotropic. Using a thin film of YBCO grown on an off-axis cut SrTiO$_3$
substrate allows one to investigate these anisotropic transport properties in a
planar and well-defined sample geometry employing a homogeneous current
density. In the normal state, the Hall voltage probed parallel to the
copper-oxide layers is positive and strongly temperature dependent, whereas the
out-of-plane Hall voltage is negative and almost temperature independent. The
results confirm previous measurements on single crystals by an entirely
different measurement method and demonstrate that vicinal thin films might be
also useful for investigations of other layered nanomaterials.
