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Left: angular dependence of the free energy . Right: equilibrium directions of the iron magnetization .
Energy of the -wall as a function of . The solid line shows the exact dependence (Eq. (44) from Ref. 6). The dashed line corresponds to the approximation of Eq. (10).
Two-domain magnetic structure of a rectangular sample. The thick arrows show the magnetization directions inside the domains that are separated by an a-wall located at X.
Sketch of the position dependence of the domain wall energy. The nucleation barrier is determined by the wall energy and width.
Temperature dependence of the expulsion field and nucleation field in an experiment with .
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