Large magnetic entropy change and magnetic phase transitions in rapidly quenched bulk Mn-Fe-P-Si alloys

Mn1.15Fe0.85P0.50Si0.45B0.05 alloys were prepared by copper mold suction casting method. Subsequent annealing processes were employed to tune the microstructures and magnetocaloric effects. Results show that Mn1.15Fe0.85P0.50Si0.45B0.05 alloys crystallize in a hexagonal phase with the Fe2P structure type. With increasing annealing temperature, the lattice parameters of a and c of Fe2P-type phase increase from 5.7988(1)Å to 6.0785(2)Å and from …