STRUCTURE AND SOFT MAGNETIC PROPERTIES OF BULK AMORPHOUS (Fe_(0.61)Co_(0.10)Zr_(0.025)W_(0.02)Hf_(0.025)Ti_(0.02)B_(0.20)_(96)Y_4 ALLOY

摘要

In this paper we present results of the structure and soft magnetic properties investigations for the bulk amorphous (Fe_(0.61)Co_(0.10)Zr_(0.025)W_(0.02)Hf_(0.025)Ti_(0.02)B_(0.20)_(96)Y_4 alloy after the solidification and annealing at 720 K for 15 min. We have stated that the as-quenched alloy is fully amorphous. However, from Mossbauer studies we have found that after the annealing a small amount of the grain nuclei in the sample occurs. The investigated alloy is a soft magnetic ferromagnet. It shows relatively high initial (higher than for crystalline soft magnetic materials) and maximum susceptibility and low core losses. Moreover, the magnetic susceptibility increases and core losses decrease after the heat treatment of the sample. It is due to the stress relieving of the sample. Additionally, this alloy is characterized by good thermal stability of the magnetic susceptibility.