Dynamic coercive field of bistable amorphous FeSiB wires

Abstract

The dynamic coercive field and area of the hysteresis loop A have been measured for bistable amorphous FeSiB wire as functions of frequency f and amplitude of an applied magnetic field. The results are presented in the form , . The values of the exponents m, p, x and z are given for an as-quenched wire with applied tension and without tension, and for an annealed wire with applied tension. The range of frequency f is from 0 to 700 Hz, and the range of amplitude is from 0 to 140 A . The exponents vary from 0.22 to 0.86. Differences are found for the first time between m and p, and between x and z. For higher frequencies (f >150-350 Hz) the bistable remagnetization process is not complete. Observed values of the exponents can be partially understood in terms of an equation of motion of reversible displacement of domain walls for the case of a small restoring force.

Frequency dependence of the single domain wall switching field in glass-coated microwires

“…However, our measurement of the FeNiMoB microwire shows a more complex frequency dependence of the switching field (figure 1). A similar dependence was also found in [9]. It consists of two parts: at low frequencies the switching field decreases with increasing frequency; in the frequency range above 50 Hz the switching field depends on f 1/3 .…”

Influence of tensile stress and frequency on the longitudinal magnetic hysteresis of amorphous wires

“…The values obtained through our measurements data are listed in Table 1 and are in good agreement with those obtained by these authors in Fe-based wires [7]. It can noted that the amplitude dependence is more pronounced for the FeSiB wire than for the CoSiB wire, which should be due to a greater influence of the applied field, whose longitudinal direction is much more closer to the core easy axis direction of the former.…”

“…3. Following a similar analysis as Aragoneses et al [7] these dependences are presented in the form:…”