Domain wall propagation in micrometric wires: Limits of single domain wall regime

We measured magnetic domain propagation and local domain wall (DW) nucleation in Fe-Co-rich amorphous microwires with metallic nucleus diameters from 2.8 to 18 mu m. We found that manipulation of magnetoelastic energy through application of applied stresses, changing of magnetostriction constant, and variation of internal stresses through changing the microwires geometry affects DW velocity. We observed uniform or uniformly accelerated DW propagation along the microwire. The abrupt increasing of DW velocity on v(H) dependencies correlates with the location of the nucleation place of the new domain wall. (C) 2012 American Institute of Physics. [doi:10.1063/1.3672076]