Hall effect in superconductors with periodic pinning arrays

We have studied the electrical resistivity and Hall effect in the dissipative regime of Nb films with periodic rectangular arrays of Ni submicrometric dots. Samples with different orientations of the pinning arrays with respect to the applied current direction were studied. The even parity in magnetic field of the Hall effect signals a “guided” motion of the vortices. Possible origins for the vortex channelling are discussed.