A spiral new element using amorphous ribbons with the field-induced anisotropy

A magnetoelastic wave element using amorphous ribbons carrying the field induced anisotropy is proposed. The (Fe
0.5
Ni
0.5
)
80
B
20
ribbon is used in this element as a medium of MEW propagation and a change rate of delay of about 20 % at a frequency of 100 kHz can be obtained. The change rate of delay increases monotonically with increasing bias field lower than an anisotropy field H
a
. This delay characteristic can be explained well by results from theoretical analyses.