Improvement of building factor of Fe-B-Si amorphous alloy toroidal cores by Mn addition

摘要

The building factor (B.F.) of Fe-Bi-Si amorphous alloy toroidal cores was improved by adding Mn to the alloy. The total iron loss of amorphous ribbons under bending strain was reduced by adding Mn. This reduction in total iron loss was the resultof reduced hysteresis loss. The critical compressive strain, which is defined as the ratio of magnetic anisotropy energy to magnetoelastic energy, was estimated by observing domain structures, and increased as the Mn content increased. The decrease inhysteresis loss in amorphous toroidal cores by Mn addition was due to this increase in the critical compressive strain.