New bubble garnet films with orthorhombic anisotropy, (YTmGdBi)3(FeGa)5O12, (YTmEuBi)3(FeGa)5O12, (YTmSmBi)3(FeGa)5O12 and (YTmLaBi)3(FeGa)5O12, have been epitaxially grown on (110) GGG substrates. Although a large in-plane anisotropy Kp of 2∼4×104 erg/cm3 is induced in YTmEu and YTmSm films, the uniaxial anisotropy Ku obtained is not large enough to be used for bubble materials. In YTmGd and YTmLa films, Ku is of almost the same magnitude as Kp with a value of 1.0∼1.5×104 erg/cm3. The wall dynamics has been investigated by stripe domain transport method. For YTmLa films, the wall mobility μ is ∼22 m/sOe, the peak velocity Vp is ∼120 m/s and the coercive force Hc is ∼0.7Oe. These characteristics may be useful for current access devices.
