The mechanism of magnetic relaxation in Fe-based nanocrystalline alloy ribbons investigated by permeability spectroscopy

In the present work, in order to elucidate the mechanism of magnetic relaxation in Fe-based nanocrystalline alloy ribbons at low fields and low frequencies, the dependence of the dynamic magnetization properties of nanocrystalline alloy ribbons on the thickness of ribbons has been investigated by permeability spectroscopy. The agreement of the experimental results with the domain wall motion equations confirms that domain wall bulging between the pinning edges is the dominant magnetization mechanism at low fields and low frequencies.