SUPERCONDUCTING FLUCTUATIONS IN AMORPHOUS ZRCO ALLOYS

The electrical resistance and low-field magnetoresistance have been measured on three dimensional ZrCo alloys. The data of magnetoresistance can be accounted for by the contributions from the quenching of superconducting fluctuation and weak localization. The former described by the Maki-Thompson (MT) correction is dorminant at low-temperatures. The interaction in the particle-particle channel gives rise to a negative magnetoresistance. The paraconductivity phenomenon has been observed and found to be in a good agreement with the sum of the Maki-Thompson (MT) term and the Aslamazov-Larkin (AL) term. The former plays an important role and the depression by the pair breaking effects due to thermal phonons may only be 10% of the term.