AMORPHOUS MELT-SPUN RIBBONS AND SPUTTERED THIN-FILMS - INVESTIGATION OF THE MAGNETIC DOMAIN-STRUCTURES BY TEM

The magnetic structures and magnetisation reversal in thinned melt spu n ribbons and sputtered amorphous thin films of Metglas 2605SC (Fe81B1 3.5Si35C2) have been studied using Lorentz electron microscopy. In the thinned ribbon material it was found that the magnetic structures wer e strongly influenced by thickness variations. In the sputtered thin f ilms, there were strong deviations of the mean magnetisation direction within the domains in bands with a sub-micrometer width. The domain w all structure itself was highly complex and wall splitting was found t o be a characteristic feature of the walls. The films displayed a tend ency to be isotropic and it was always possible to nucleate domain wal ls parallel to the applied field direction.