DEPENDENCE OF MAGNETIZATION DYNAMICS AND MAGNETO-IMPEDANCE EFFECT IN FESIB AMORPHOUS WIRE ON ANNEALING CONDITIONS

Dependence of magnetization dynamics and magneto-impedance effect in p ositively magnetostrictive Fe77.5Si7.5B15 amorphous wires on annealing conditions was studied. The observed MI ratio of the annealed samples was as much as 36% and the optimum annealing conditions were suggeste d. The locus of magnetization vector of the annealed wire indicated th at the circumferential magnetization was easily proceeded in the annea led wire. It was also suggested that the effect of oxidation should be considered for the samples annealed in air.