Hysteresis loop shift in annealed FeCrSiB amorphous wires

After annealing at 475-525 deg. C and premagnetizing at a positive field of 60 kA/m, the quasi-saturated hysteresis loops of Fe65.9Cr11.6Si7.5B15 amorphous wires made by the in-rotating-water quenching technique are shifted in the negative field direction. The shift can be as large as 102 A/m, which is in contrast to the slight shift of 100 A/m in CoFeSiB-based ribbons found before. Although this phenomenon can be attributed to the existence of aligned hard magnetic crystallites, its detailed mechanism remains unclear