Abstract
Laws of approach to magnetic saturation are derived for interacting spherical and cylindrical defects in isotropic magnetostrictive media like amorphous materials. The normalized longitudinal magnetic deviation ΔM/M goes as 1/H2for both cases, provided all defects have the same sign. For randomly signed defects, 1/H5/4and 1/H3/2laws for spheres and cylinders, respectively. Isolated cylindrical defects obey a 1/H or 1/H2law depending on whether the defect is small or large compared to an exchange length.
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