Abstract

The field H*(T) for the onset of dissipation is estimated self-consistently from the results of an investigation of the transverse resistance and current-voltage characteristics of a Bi2Sr2CaCu2O8 (BSCCO-2212) single crystal in a mixed state. It is established that H* is close to Hc1 in the interval Tc/2⩽T⩽Tc. Rapid growth of H*(T), accompanied by a transformation of the current-voltage characteristics, as the temperature decreases below ≈ 40 K attests to the formation of a nonvanishing region of stability of an ordered state of the vortex system, possibly as a result of a change in the effective dimensionality of the fluxoid.

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