Patent ID: 8911572

Claim:
A ferromagnetic Fe-based metallic glass formed of an alloy comprising at least Fe, P, C and B, where Fe comprises an atomic percent of at least 60, P comprises an atomic percent of from 5 to 17.5, C comprises an atomic percent of from 3 to 6.5, and B comprises an atomic percent of from 1 to 3.5; further comprising at least Mo and Ni, and optionally Co and Si; and wherein the concentrations of Mo and Ni vary in accordance with the concentration of Co and Si as follows: where Si comprises an atomic percent of from 0 to 0.5 and Co comprises an atomic percent of from 0 to 6, then Mo comprises an atomic percent of from 4.5 to 5.5, and Ni comprises an atomic percent in a range as defined by the following equation: m-k·z, where m ranges from 4 to 6, k ranges from 0.5 to 1, and z represents the atomic percent of Co, and where Si comprises an atomic percent of from 0.5 to 1.5 and Co comprises an atomic percent of from 0 to 6, then Mo comprises an atomic percent of from 3.5 to 4.5 and Ni comprises an atomic percent of from 2.5 to 4.5, and wherein the alloy has a critical rod diameter of at least 3 mm.