Dynamic diffuse wall in magnetic bubble garnet material

Abstract

A new dynamic domain wall has been discovered in magnetic bubble garnet materials. Single 10‐nsec exposure photographs show that it is diffuse in nature with a width that is velocity dependent. The maximum width observed is 28 μm for a wall moving at 290 m/sec in expanding and collapsing bubbles. With a constant in‐plane field applied (50 or 100 Oe) walls moving parallel to the field become wide and diffuse in about 100 nsec, whereas walls moving perpendicular to the in‐plane field move faster but do not exhibit the diffuse boundary.