Resistance anomaly in superconducting Bi2Sr2CaCu2O8 single crystals

We have measured the resistance of some Bi2Sr2CaCu2O8 superconducting single crystals along ab plane and the c axis. In some single crystals, a remarkable resistivity anomaly near the superconducting transition temperature is observed in the ab plane. The peak is suppressed and vanishes gradually with increasing applied magnetic field (>100 Gs) or transport current. We proposed that the resistance peak is a quasi-reentrant behavior due to the inhomogeneous distribution of the superconducting phase.