FORMATION OF MULTIBRANCHED DOMAINS IN GARNET BUBBLE-FILMS BY LOW-BIAS-PULSE METHOD

The formation of multi-branched domains(MBDs)at low static bias field was first studied. With multiple branches, MBDs contain more or less s ame-signed vertical-Bloch-lines(VBLs) in their walls. Experiments on f our samples have shown that under certain conditions, the amount and h ardness of the MBDs formed can be easily controlled, and so-called ''l ow-bias-field method'' is another effective way to form VBL chains. It was found that MBDs are formed due to the expansion of domain segment s after compressed by a rectangular bias pulse. The number of VBLs nuc leated in domain walls is affected by the space where the domains expa nd rapidly.