STRUCTURE OF THE AMORPHOUS PHASE DURING CRYSTALLIZATION OF FE73.5CU1NB3SI13.5B9 ALLOY

Mossbauer spectroscopy and the positron annihilation technique have be en used to investigate the structure of the amorphous phase of Fe73.5C u1Nb3Si13.5B9 nanocrystalline alloy annealed at different temperatures . The results show that there is a weak ferromagnetic amorphous bounda ry with a low hyperfine field. On other hand, the results of positron annihilation indicate that a large amount of vacancy-like defects appe ars in the amorphous phase at higher temperature. The results of magne tic measurements indicate that the magnetic properties of nanocrystall ine alloy are closely related to the density of defects.