MAGNETOELASTIC ANISOTROPY DISTRIBUTION IN GLASS-COATED MICROWIRES

Amorphous microwires, obtained by the glass-coated melt-spinning metho d having diameters in the range of micrometers, can exhibit perfectly square (single and large Barkhausen jump) or quasi-anhysteretic hyster esis loops, depending on the easy magnetization direction determined b y the intrinsic magnetoelastic anisotropy. The thermoelastic internal stressed frozen-in during the fabrication that model the domain struct ure are here calculated by considering the classical theory of elastic ity. A complex stress distribution is obtained having magnitude of 10( 3) MPa. Circular stresses turn out to be predominant, which arises fro m the composite nature of the microwire (metallic nucleus and insulati ng glass coating having different mechanical and thermal properties).