Enhanced circular susceptibility of nearly-zero magnetostrictive amorphous wires under axial bias field

The circular susceptibility of nearly zero magnetostrictive amorphous wires with saturation magnetization M-s under an axially applied magnetic field H can be one order of magnitude greater than M-s/H, the theoretical circular susceptibility deduced from the assumption of zero anisotropies. This phenomenon should be seriously considered in recent studies on magneto-impedance, and it can also become a powerful probe to the micromagnetic structure and local anisotropies in ferromagnetic wires if its further understanding is reached. (C) 1999 Elsevier Science B.V. All rights reserved.