Fast Magnetization Switching in Thin Wires: Magnetoelastic and Defects Contributions

In this work we measured and analyzed domain propagation and local domain wall nucleation in various magnetic Fe-Co-rich amorphous microwires with metallic nucleus diameters (from 12 mu m till 22 mu m), paying attention on effect of applied and internal stresses and taking into account nucleation of additional domain walls on local defects existing in microwires and observed through the local domain walls nucleation far from microwires ends. Domain propagation and local domain wall nucleation has been measured modified Sixtus Tonks method. Application of tensile stresses results in decreasing of domain wall velocity. We discussed magnetoelastic contribution plays and role of defects in dynamics of domain wall propagation.