Permeability spectra of neutron-irradiated and annealed amorphous FeCuNbSiB ribbons

Soft magnetic properties and microstructure of novel Nb poor Finemet type alloys

“…The magnetisation by domain wall motion has a threshold field, which can conquer the domain wall pinning from defects. 22,23 The relaxation of domain wall motion begin to contribute to the loss when the field exceeds the threshold filed up to 1?69 A m 21 . This is why the loss peaks appear with the field increases.…”

Domain wall pinning in polycrystalline perovskite La0.7Sr0.3MnO3

“…Temperaturedependence permeability was measured in a thermostat, which gives an accuracy of better than 1 K by means of a proportional integral differential (PID) controller. The complex permeability can be described by the sum of two decomposed relaxations as follows [14]:…”

Permeability spectra study of Fe73.5Si13.5B9Cu1Nb3−xAlx (x=0, 0.1, 0.2, 0.4, 0.8 and 1.6)

“…Generally, the reversible magnetization process is faster than the irreversible domain wall motion and the relaxation in the lowand high-frequency regions may correspond to the irreversible domain wall motion and reversible magnetization, respectively [17]. For the relaxation process, f 0 may be approximately expressed as f 0 = 81σ w ρ/8πμ 2 0 M 2 s L 2 [18], where σ w is the domain-wall energy density, ρ the resistivity, M s the saturation magnetization, and L the average domain thickness.…”