We have measured the resistance of some Bi_(2)Sr_(2)CaCu_(2)O_(8) superconducting single crystals along ab plane and the c axis.For some of the single crystals,a resistivity anomaly near the superconducting transition...We have measured the resistance of some Bi_(2)Sr_(2)CaCu_(2)O_(8) superconducting single crystals along ab plane and the c axis.For some of the single crystals,a resistivity anomaly near the superconducting transition temperature is observed in the ab plane.This giant resistance peak is independent of the small driving current(I≤40 mA),and the peak is suppressed and vanished gradually with the increasing applied magnetic field(>100 G).We proposed that the resistance peak is a quasi-reentrant behavior due to the superconducting phase inhomogeneous distribution.展开更多
文摘We have measured the resistance of some Bi_(2)Sr_(2)CaCu_(2)O_(8) superconducting single crystals along ab plane and the c axis.For some of the single crystals,a resistivity anomaly near the superconducting transition temperature is observed in the ab plane.This giant resistance peak is independent of the small driving current(I≤40 mA),and the peak is suppressed and vanished gradually with the increasing applied magnetic field(>100 G).We proposed that the resistance peak is a quasi-reentrant behavior due to the superconducting phase inhomogeneous distribution.