The soft magnetic properties of Fe-Al-Nb-B alloy ribbons crystallized from an amorphous state were investigated. These alloy ribbons showed high magnetic flux density corresponding to that of Fe-based amorphous alloy ribbons after annealing. Fe79Al4Nb5B12 alloy ribbon showed particularly good soft magnetic properties (Bs=1.46 T, λs=2.0 × 10-6, Pc=15 Wkg-1 (f= 100 kHz, Bm=0.1 T)). The ribbons were composed of bccFe crystallites in the disordered phase, with a grain diameter of less than 20 nm. It was presumed that most of the Al in the alloy was contained in the bccFe crystallite.
A new method is presented by which grains in grain-oriented silicon steel can be imaged clearly through an overcoating. A miniaturized magnetic anisotropy probe consisting of an exciting coil and a pickup coil is used as a scanning device. Each grain of the silicon steel is detected as a region within which the easy axis of the magnetic anisotropy is determined to lie in a common direction. Because of its built-in spatial differentiation, the probe is also sensitive to magnetic dis-continuities in a specimen. With these two probe attributes, grains are imaged with the grain boundaries enhanced. The alignment of the easy axis, that is, the  direction projected onto the scanning plane with respect to the rolling direction, is displayed on a gray-scale level. Imaging results are shown for highly grain-oriented silicon steel sheets.