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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Original Russian Text © R.M. Vakhitov, E.B. Magadeev, A.R. Yumaguzin, R.V. Solonetskii, 2015, published in Fizika Tverdogo Tela, 2015, Vol. 57, No. 8, pp. 1462–1466.
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Vakhitov, R.M., Magadeev, E.B., Yumaguzin, A.R. et al. Stable states of magnetic inhomogeneities localized in the region of defects. Phys. Solid State 57, 1488–1493 (2015). https://doi.org/10.1134/S106378341508034X
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DOI: https://doi.org/10.1134/S106378341508034X