MEASURING THE VELOCITIES OF DOMAIN-WALLS IN MAGNETIC-BUBBLE GARNET-FILMS

This paper describes a technique for accurately measuring the velociti es of domain walls under a stable effective magnetic field. An image o f a domain with inverse magnetization is generated by a pulsed remagne tization field at a point or Linear defect and is recorded using high- speed photography. The dimensionless Gilbert damping parameter can be derived from the domain-wall velocity measured as a function of the ef fective magnetic field.