Abstract
Fe-rich and Co-rich amorphous magnetostrictive wires have shown sensitive bistable flux reversal (large Barkhausen effect or re-entrant flux reversal) characteristics. Fe-Co, Fe-Cr and Fe-Ni system amorphous wires were prepared, and their various magnetic properties (M s , M r /M s , K u , ? s , H*, and ? s M s /K u ) were measured to investigate the general properties of the large Barkhausen effect and stress sensitivity of such amorphous wire. A domain wall propagates through an inner core of diameter about 1/?2 times that of positive-magnetostriction wires, and about 1/?3 times that of negative-magnetostriction wires. The stress sensitivity of magnetization was analyzed using a figure of merit F defined as (3/2) ? s M s (1?(M r /M s )2) (M r /M s )/K u .
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