An ideally soft ferromagnet: is it feasible?

The infinite initial susceptibility encountered in the micromagnetics computations of sufficiently small, amorphous ferromagnetic spheres is argued to be a real physical phenomenon, which may actually be realized in practice as a very large enhancement of the initial susceptibility of thin, amorphous ferromagnetic films, when they are subdivided into separate discs. The only difficulty is to make the films highly homogeneous, and to avoid mechanical strains as much as possible. (C) 2000 Elsevier Science B.V. All rights reserved.