Single-Domain wall velocity, energy and shape during magnetization reversal in Fe-based bistable microwires

The domain wall dynamics during magnetization reversal process of glass-coated amorphous Fe_77.5Si_7.5B₁₅ bistable microwire was considered. Its domain structure deriving from the magnetoelastic and shape anisotropies consists of an axial single domain and two closure domain structures at the ends, plus an outer radial-helical shell in its surface. This articles report the measured domain wall velocities, mobilities, and shape, which enables the determination of the domain wall energy per unit area, g, from direct observations of the domain wall length, L.