EFF ECTS OF STRUCTURAL RELAXATION AND CRYSTA-LLIZATION ON SUPERCONDUCTING PROPERTIES IN AMORPHOUS ALLOY Zr_(87.7)Si_(12.3)

The 1 hour isochronal annealing treatment has been made on amorphous alloy Zr87.7 Si12.3. The changes of the superconducting critical parameters, Tc and H C2 and their transition width have been measured for different annealing temperatures. The different change laws of metal-metal type amorphous alloys were observed. The experimental results-were discussed in connection with the toplogical short range order and the chemical short range order in the process of structural relaxation and the corresponding crystallization mechanism.