New bubble materials with high peak velocity

Peak velocities higher than 40000 cm s
^-1
and domain wall mobilities of the order of 1500 cm s
^-1
Oe
^-1
were measured by the dynamic bubble collapse method in garnet films having an orthorhombic anisotropy. The orthorhombic anisotropy was realized by growing garnet films with positive magnetostriction constants under strong compression on