Figure 9.

Sketch of the theoretical model developed to quantitatively describe the MFL as a result of the spatial divergence of the samples’ magnetization distribution in terms of the magnetic volume charges inside the domain walls between adjacent domains. The actual magnetic charge distribution ${\rho }_L(x)$ (red line) is modelled by a sum of small volume elements of widths $B$, where the total width of the magnetic charge distribution within the ferromagnetic layer (F) is described by $w_{\rho }$. $s(i)$ represents the shift of the volume element $i$ with respect to the origin of the coordinate system.