Dynamic properties of bubbles and stripes in tilted [111] garnet films

Several kinds of garnet films have been grown by LPE techniques on substrates whose surface normals slightly tilt from the crystallographic [111] axis. Magnetic anisotropies induced in these films are orthorhombic-like. With the increase of the [111] axis tilting angle Δ
c
, the easy direction of a uniaxial part K
u
tilts away from the surface normal and the magnitude of an in-plane part K
p
, which is not the projection of K
u
onto the film plane, increases almost linearly, reaching
\eta\equivK_{p}/2\piM_{s}^{2}\simeq5
at
\Delta_{c}\simeq6\deg
. In order to investigate the effect of in-plane anisotropy thus induced on the domain wall motion, bubble and stripe domain transport velocities are measured. Both bubble and stripe velocities increase with the increase of in-plane anisotropy. However, the increase of peak velocities of stripe domains, which has been shown to correspond to the punch-through threshold of a horizontal Bloch line in a plane wall, with the increase of K
p
is much smaller than that predicted by Schlömann's calculation.