Study of crystallization and magnetic properties of Co-based amorphous metallic alloys as a function of the Pt content

Abstract Amorphous Co 78− x Pt x (BSi) 22 ( x =0, 5, 15, 25, 39) alloys were produced by melt-spinning. Crystallization process and final crystallized products of the amorphous alloys were sensitive to the Pt content. CoPt crystals were observed when x ⩾25 and its fraction decreased at x =39 due to the Pt 2 B 3 formation. In spite of the nucleation of CoPt, the highest coercivity was obtained with x =15.