Soft magnetic (Fe, M)–Y–B (M = Co or Ni) bulk metallic glasses

Thermal and magnetic properties of Fe69–74Y4–9B22, and (Fe, M)12Y6B22 (M = Co or Ni) bulk metallic glasses (BMG) were investigated. The alloys keep the ability to cast BMGs as Co or Ni replacement is up to 36 or 10 at.%. Saturation magnetization decreases from 1.47 T (Fe72Y6B22) to 1.11 T (36 at.% Fe replaced by Co) and to 1.24 T (10 at.% Fe replaced by Ni). The coervcivity is 10–40 A/m, the Curie temperature is higher than 535 K, and electrical resistivity is greater than 200 μΩ cm for all the studied BMGs. With such promising properties, these alloys are potential for industrial applications.