Abstract
The free bubble domain wall radial velocity and mobility in GdCoMo sputtered amorphous films has been measured and compared to stripe wall motion in the same sample. A sampling optical microscope with a sampling time of 10 nsec and a single exposure electronic recording TV system was used to observe the transient bubble size and stripe width. Wall velocities up to 400 m/sec were observed for applied fields up to 350 Oe. The velocity for some samples was linear with respect to drive although nonlinear behavior was also observed as well as domain distortion on the very temperature-sensitive samples. For the linear samples, a mobility of 1.95 m/sec Oe was measured in the effective drive field range 0–200 Oe.
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