Abstract
Current-voltage characteristics of single crystals of the 84-K superconducting phase Bi/sub 2.2/Sr/sub 2/Ca/sub 0.8/Cu/sub 2/BO/sub 8<+/delta$ show no threshold behavior in small magnetic fields at 50--80 K, despite large zero-field critical currents which are only weakly field-dependent at low temperatures (<20 K). We attribute this to a low-field flux-flow resistivity which shows an empirical scaling behavior near T/sub c/ and which we can use to infer some basic properties of the superconductor. This behavior is intrinsic to Bi/sub 2.2/Sr/sub 2/Ca/sub 0.8/Cu/sub 2/BO/sub 8<+/delta$ and has crucial implications for its technological potential of the compound.
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