Evaluation of the saturation magnetostriction in nearly zero magnetostrictive glass-coated amorphous microwires

Measurements of the saturation magnetostriction lambda(s) of glass-coated c overed (Co1-xMnx)(75)Si10B15 (x=0.09, 0.10 and 0.105) and Co56.5Fe6.5Ni10B1 6Si11 amorphous microwires carried out by means of the stress dependence of initial magnetic susceptibility method are reported. The conditions of app licability of this method to the microwires have been analyzed, taking into account the domain structure expected for very low negative magnetostricti on of the metallic nucleus. The experimental data of lambda(s) obtained in those amorphous microwires are in agreement with those reported in amorphou s ribbons with similar compositions. (C) 2000 American Institute of Physics . [S0021-8979(00)78908-0].