<Abstrate>

New Fe₂₅Co₂₅Ni₂₅(P, C, B)₂₅ high entropy bulk metallic glasses (HE-BMGs) with

large supercooled liquid region (ΔT_x) and excellent soft magnetic and mechanical

properties were developed. Fully HE-BMG rods were successfully prepared by

copper mold casting in the composition region of 7.5–12.5 at% P, 7.5–10 at% C,

and 5–10 at% B, respectively. The HE-BMGs possess low glass transition

temperature (T_g) of ∼672 K and large ΔT_x of ∼56 K, which are comparable to

those of Zr-based BMGs, whereas exhibit much higher yield strength of ∼3210 MPa

with distinct plasticity. The alloys also show low coercivity of ∼1.2 A/m and high

saturation magnetization of ∼0.86 T. The mechanism of good stability of the

supercooled liquid and the correlation between strength and T_g for the HE-BMGs

were discussed.
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