Hall resistivity measurements as function of temperature in the vicinity of ST-c were carried out on a tin films YBCO superconductors. A sign reveral of hall voltage with external magnetic field applied along c axis have been observed upon crossing T_c. Hall voltage in the mixed statw was found to be insensitive to the external magnetic field inversion. These effects are discussed and explained in terms of vortex motion under the influence of Magnus force balanced by large damping force. It is argued that in this model the flux-line velocity has component opposite to the superfluid current direction thus yielding a negative Hall voltage.
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