Abstract
The topology and conditions of nucleation of magnetic inhomogeneities at defects of a uniaxial ferromagnet have been investigated theoretically. It has been shown that, for specific material parameters, two types of inhomogeneities corresponding to a 0-degree domain wall, which differ in the size, amplitude, and energy, can arise at defects. It has been found that the large-amplitude inhomogeneity is a metastable formation. However, with inclusion of demagnetizing fields of the sample, it can become stable, i.e., energetically more favorable in comparison with the small-amplitude inhomogeneity. The possible contribution from this inhomogeneity to the static and dynamic processes of magnetization reversal of magnetic materials has been considered.
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