Abstract
Magnetic properties were measured on Co-Si-B amorphous wires with negative magnetostriction prepared by in-rotating water quenching technique and results were compared to those of Fe wires with positive magnetostriction. The Co wire was found to exhibit the large Barkhausen discontinuities as well as Matteucci effect similar to the Fe wire. It was also found that the Co wire shows a bamboo-like domain pattern at the surface and has a reverse domain propagation mobility larger than the Fe wire.
