Quaternary Magnetic fenipc bulk metallic glasses with large plasticity

•Fe80−xNixP13C7 (x=0–30at.%) BMGs were prepared by fluxing and J-quenching techniques.•The small amount of substitution of Ni for Fe can enhance the glass forming ability.•The substitution of Ni for Fe can greatly enhance the plastic strain of FeNiPC BMGs.•Fe60Ni20P13C7 BMG has a εP of >10% which is the largest one reported for Fe-based BMGs.