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VOLUME 61 (1995) | ISSUE 7 | PAGE 575
Magnetic-field dependence of the resistance of 2D type-II superconductors in weak magnetic fields
Peaks have been observed in the resistance of amorphous thin films of NbOj with a small number of pinning centers in weak magnetic fields, in which the current-voltage characteristics become nonohmic. The width of these peaks depends on the width of the film. The maximum peak height is more than an order of magnitude greater than the flux-flow resistance. It is suggested that the observed increase in the resistance results from a transition of the 2D type-II superconductor into a previously unknown phase. © 1995 American Institute of Physics.