Separation of Magnetization Loop in Domain Wall Movement and Domain Rotation Contributions for Soft Magnetic Materials

The domain wall movement and magnetization rotations processes are separated experimentally in quasi-static magnetization process of a Finemet type ultrasoft magnetic material. The reversible domain rotations contribution is obtained from the integration of the reversible permeability, $μ_{DR}$, as a function of biasing DC field, measured with very small alternative field amplitude, less than 0.05 $H_c$. The domain wall movement component is obtained by the integration of the permeability obtained by extraction of $μ_{DR}$ from the differential permeability derived from one branch of the quasi-static major loop.