Scaling behavior of mixed-state hall effect in MgB2 thin films

The Hall resistivity (ρxy) and the longitudinal resistivity (ρxx) in c-axis-oriented superconducting MgB2 thin films have been investigated in extended fields up to 18 T. We have observed a scaling behavior between the Hall resistivity and the longitudinal resistivity, ρxy=Aρxxβ, where the exponent (β) is observed to be independent of the temperatures and the magnetic fields. For a wide magnetic field region from 1 to 18 T and a wide temperature region from 10 to 28 K, a universal power law with β = 2.0 ± 0.1 was observed in c-axis-oriented MgB2 thin films. These results can be well interpreted by using recent models.