Tunable Curie temperature and magnetocaloric effect of FeCrMoCBYNi bulk metallic glass with different crystallized phases

The investigation on Curie temperature and magnetocaloric effect of the FeCrMoCBYNi bulk metallic glass (BMG) with different crystallized phases was carried out by XRD, TEM and PPMS. The experimental results show that the Curie temperature (T_c) of Fe₄₅Cr₁₅Mo₁₄C₁₅B₆Y₂Ni₃ BMG with different annealing condition reaches a highest value of 95 K. The value of magnetic entropy change ΔS_M (T) of Sample 3 reaches a maxima of 0.48 J/(kg·K) at T_c temperature, which result from the interaction among the precipitated phases of (Fe,Cr)₂₃(C,B)₆, Fe₃Mo₃C and residual amorphous phase. Based on the experiment results, it can be obtained that the Curie temperature, magnetocaloric effect can reach their optimal value at low temperature, when the content of amorphous phase and precipitated phases type run up to certain value. The magnetic properties of Sample 1 with full amorphous phase and Sample 4 with full crystalline phase will both decrease.