Correlation between soft-magnetic properties and T-x1-T-c in high B-s FeCoSiBPC amorphous alloys

摘要

Effects of Co addition on magnetic properties and thermal parameters of high saturation magnetic flux density (B-s) Fe83-xCoxSi2B11P3C1 (x = 0, 5, 10, 15 and 20) amorphous alloys are investigated. The B-s of the Co-doped alloys can be effectively enhanced to 1.74 T from 1.67 T. Curie temperature (T-c) increases greatly and even exceeds the first crystallization temperature (T-x1) with the increase of Co content to x = 20. The soft-magnetic properties of these high B-s alloys deteriorate with the introducing of Co. It is found that soft-magnetic properties correlate strongly to temperature interval between T-c and T-x1 (T-x1-T-c) of the Co-doped high B-s FeSiBPC amorphous alloys. The domain structures are characterized via the Magneto-optical Kerr Microscope in order to demonstrate the importance of large T-x1-T-c on achieving good soft-magnetic properties. (C) 2015 Elsevier B.V. All rights reserved.