Dynamics of domain growth driven by dipolar interactions in a perpendicularly magnetized ultrathin film

Measurements of the ac magnetic susceptibility of perpendicularly magnetized Fe/2 ML Ni/W(110) ultrathin films show a clear signature of the dynamics of domain growth and domain density changes in the domain pattern that this system supports. The susceptibility peak measured at different constant heating rates in the range 0.20 K/s≤R≤0.70 K/s shifts to higher temperature as the heating rate is increased. Analysis using a relaxation model …