Frequency- and axial-field-dependent circular magnetization reversal in a stress-annealed Fe-based nanocrystalline wire

Absract After suitable annealing under a tensile stress, Fe73.5Cu1Nb3Si13.5B9 amorphous wire becomes the nano-structured material together with a transverse anisotropy field Hk=−3.2 kA/m. Its circular permeability, μ=μ′−jμ″, was determined from the measurements of the impedance, as a function of the frequency (f=333–33,333 Hz) and amplitude (IAC=0.1–100 mA) of AC current and the axially applied DC field (H=0–89 kA/m). We found that the circular technical magnetization of this sample carried out by the spontaneous domain nucleation process. The influences of the AC current frequency and the axial DC field on the circular magnetization have been studied.