Asymmetric pinning of vortex domain walls in magnetic films in regions with lowered saturation magnetization

The asymmetric pinning of vortex domain walls in a region with a lowered saturation magnetization has been investigated in ferromagnetic films with the in-plane anisotropy. Numerical micromagnetic simulation within the two-dimensional model of the magnetization distribution has been used. The wall structure and the depinning fields in different directions have been investigated depending on the dimensions of the region with lowered saturation magnetization and the film thickness. The physical factors that determine the obtained regularities have been established.