LAUSR

We studied the magnetic properties and domain wall (DW) dynamics of Fe_47.4Ni_26.6Si₁₁B₁₃C₂ and Fe_77.5Si_7.5B₁₅ microwires. Both samples present a rectangular hysteresis loop and fast magnetization switching. The linear region of dependence of the DW velocity on the magnetic field in Fe_47.4Ni_26.6Si₁₁B₁₃C₂ sample is considerably shorter. Consequently, we studied the structure of Fe_47.4Ni_26.6Si₁₁B₁₃C₂ sample using X-ray diffraction and atom probe tomography. The results obtained using the atom probe tomography supports the formation of B-enriched precipitates in the interfacial layer and in the metallic nucleus after annealing.