We have measured the magnetoresistance of Zn-doped superconducting Bi2Sr2Ca
Cu2O8 single crystals and found that for a small driving current (less than
or equal to 20mA) the resistance displays a very sharp rise just below Tc
before the zero-resistance state is reached. The resistance anomaly disappe
ared when a magnetic field (approximate to 100Gs) or a large current was ap
plied. We proposed that the resistance peak is a quasireentrant behavior du
e to the superconducting phase inhomogeneous distribution resulting from th
e Zn doped.