Kerr-effect based Sixtus-Tonks experiment for measuring the single domain wall dynamics

Abstract

Here we present the Kerr-effect-based Sixtus-Tonks experiments to study the single domain wall dynamics. It combines the advantage of the classical Sixtus-Tonks experiments with the quick optical method to register the domain wall propagation. Instead of the pick-up coil, the reflection of the broken laser beam from the microwire surface is used. The change of the reflected signal has much smaller relaxation time than that of the pickup coil, that allows us to study the propagation of small and fast domain walls. We compare the measurement obtained by the classical and Kerr-effect-based Sixtus-Tonks experiment.