Effects of in-plane field on domain wall dynamics in amorphous GdCo magnetic films

Previously we reported the dynamics of an isolated straight domain wall near the compensation point in amorphous GdCo and GdCoAu films prepared by rf-sputtering. Nonlinear dependence of the wall velocity on drive field is observed. Here we describe the effects of externally applied in-plane field and in-plane anisotropy of the film on domain wall dynamics in amorphous GdCo magnetic films. The wall whose plane is perpendicular to the in-plane easy axis shows higher velocity and smaller wall motion coercive force compared with the wall whose plane is parallel to the in-plane easy axis. The domain wall velocity depends on the directions of pulse magnetic field and external in-plane field. The effects of external in-plane field in low field region are different from those in high field region.