Giant magneto impedance (GMI) has been measured in Fe77.5Si13.5B9 wire
s and Co67Fe3Cr3Si15B12 ribbons. The samples were annealed in order to
induce specific anisotropies. An hysteretic behavior of the GMI is ob
served in both cases. Results show that this hysteretic behavior is re
lated to irreversible changes in the magnetization processes of the sa
mples. (C) 1998 American Institute of Physics. [S0021-8979(98)04422-3]
.