Destruction of the phase coherence by magnetic field in the fluctuation region of thin superconducting films

Reduction of the gradient of current density is observed near Tc in thin superconducting films. This effect is explained by the influence of fluctuation superconductivity on the current density distribution. The observed suppression of this effect by low magnetic field is explained by the destruction of phase coherence by magnetic field. The current density distribution in high magnetic field does not differ from that in the normal state down to low temperature (T<<Tc2). This is interpreted as evidence that the superconducting state without pinning below Hc2 is not a vortex liquid but a state without phase coherence.