INFLUENCE OF MAGNETIC-FIELD ON THE RESPONSE OF FESIB WIRE DELAY-LINES

The effects of the exciting magnetic field as well as of the bias magn etic field applied at the exciting or receiving points for Fe77.5Si7.5 B15 amorphous magnetostrictive wire, used as delay lines, have been in vestigated. Amorphous wires have been tested in the as-cast state and after the stress-relief process. The increase in the value of the exci ting magnetic field leads to an increase in the value of the pulsed vo ltage output. The maximum values for the pulsed voltage output are obt ained for about 5 mu s pulse width and 15 A amplitude of the pulsed ex citing current. The dependence of pulsed voltage output on the bias ma gnetic field at the exciting or receiving points is not monotonic for all tested samples. The maximum response is obtained for about 100-200 A/m and 100-300 A/m bias magnetic field applied in exciting and recei ving points, respectively. (C) 1997 American Institute of Physics.