Study of Domain Wall Dynamics in GdFeCo Using Double High-Speed Photography

It is shown using the technique of double high-speed photography that an external magnetic field triggers the motion of a GdFeCo domain wall with a velocity up to 1.2 km/s. The domain wall velocity increases and levels off with an increase in the amplitude of the driving magnetic-field pulse. In contrast to the earlier experiments on iron ferrites, no influence of femtosecond laser pulses on the domain wall dynamics has been observed, even when the pump pulse energy is sufficient for magnetization reversal.

Automated summary

Using double high-speed photography, it has been demonstrated that an external magnetic field can induce the movement of a GdFeCo domain wall at velocities of up to 1.2 km/s. The velocity of the domain wall increases and levels off as the amplitude of the driving magnetic field pulse increases. Unlike previous experiments on iron ferrites, no impact of femtosecond laser pulses on the dynamics of the domain wall has been observed, even when the pump pulse energy is sufficient for magnetic reversal.