Magneto-optical imaging of the domain wall distortions enhanced by magnetic fields in amorphous glass-coated microwire

Here, we employ time-resolved magneto-optical Kerr system (MOKE) imaging to ascertain the origin of domain wall motion in microwires. The MOKE visualisations of the domain walls motion on the surface of the microwires prove the domain wall pinning and distortions tailored due to the perpendicular magnetic field. It is shown that domain wall pinning in a perpendicular field increases the domain wall tilting angle, which is in turn, related to the apparent domain wall velocity. The obtained result is important for correct interpretation of domain wall velocity measurements in microwires obtained by the Sixtus-Tonks method.