抄録
Stripe domin head dynamics for a strong drive field in a current stretcher bubble detector have been studied for three different component garnet films with different dynamic properties. It has been observed that the stripe head velocity is sometimes very small in the beginning of stretching in a hard bubble suppressed region and that there are two streching modes with fast rise and slow rise times in an unimplanted stretching region. The stripe head mobilities in the fast rise mode are approximately 1/3 the plane wall mobilities. The mobilities in the slow rise mode are mostly proportional to Gilbert’s damping parameters. These two modes are discussed as originating from vertical Bloch lines at the stripe head by using Slonczewski’s velocity equation for a adomain wall with Bloch lines. Saturation velocities obtained for two modes are 42 m/s, which is nearly equal to plane wall peak velocity.
