MEASUREMENTS OF MAGNETIZATION DYNAMICS AND MAGNETOIMPEDANCE IN FECOSIB AND FESIB AMORPHOUS WIRES

A technique to observe magnetization dynamics in amorphous wires is de scribed. When an ac current passes through the amorphous wire, voltage s induced between both ends of the wire and in a pickup coil wound aro und the wire are observed. These voltages indicate circumferential and axial components of magnetization changes in the wire, respectively. Observations in a Go-rich wire having slightly negative magnetostricti on and an Fe-rich wire having positive magnetostriction under various bias fields showed quite different wave forms which indicate their dom ain structure. (C) 1996 American Institute of Physics.