Controlling the Domain Wall Dynamics by Induced Anisotropies

Amorphous glass-coated microwires are magnetic materials well-known by very high domain wall velocities reaching up to 15 km/s. In the previous works was shown, that domain wall dynamics in microwires could be effectively tuned by biasing of additional anisotropies. Here we show the possibility of inducing anisotropy to the microwires. Thermal annealing at 300
$^{\circ}{\rm C}$
in perpendicular field speeds-up domain wall velocity from 1 km/s (as-cast state) to 6 km/s. On the other side, thermal annealing at the same temperature but without perpendicular field leads to the maximum domain wall velocity of about 4 km/s only. This underlines the importance of two perpendicular anisotropies on fast domain wall velocities in microwires.