Patent ID: 7223310

Claim:
A soft magnetic Co-based metallic glass alloy product with high glass forming ability, comprising metallic glass alloy being represented by the following composition formula: [Co 1−n−(a+b) Fe n B a Si b ] 100−χ M χ , wherein each of a, b and n represents an atomic ratio satisfying the following relations: 0.1≦a≦0.17; 0.06≦b≦0.15; 0.18≦a+b≦0.3; and 0≦n≦0.08, M represents one or more elements selected from the group consisting of Zr, Nb, Ta, Hf, Mo, Ti, V, Cr, Pd and W, and χ satisfies the following relation: 3 atomic %≦χ≦10 atomic %, wherein said glass alloy product has minimum thickness or diameter of 0.5 mm or more, and said metallic glass alloy has a supercooled-liquid temperature interval (ΔT χ ) of 40 K or more, a reduced glass-transition temperature (T g /T m ) of 0.59 or more and a coercive force of 2.0 A/m or less, said metallic glass alloy being cooled and solidified from its liquid phase in a supercooled liquid state.