STUDY OF MAGNETIC DOMAINS IN AMORPHOUS RIBBONS BY SCANNING ELECTRON ACOUSTIC MICROSCOPY

Scanning electron acoustic microscopy (SEAM) has been used in the observation of domain walls in iron- and cobalt-based amorphous alloys ribbons. Controlled magnetic annealing experiments enabled the direct identification of domain walls in SEAM micrographs. Walls in perpendicular anisotropy regions of the high magnetostriction samples show a particular high contrast, probably related to the wall stress field.