Abstract
The magneto-caloric effect (MCE) of a Gd55Co25Al18Sn2 bulk metallic glass (BMG) is investigated. The Gd55Co25Al18Sn2 as-cast rod prepared by a water-cooled copper mold suction casting method exhibits typical amorphous characteristics. The maximum magnetic entropy change (− ΔSmpeak) and the magnetic refrigerant capacity (RC) of the BMG under a field of 5T are about 9.32 J·kg−1 ·K−1 and 832 J·kg−1, respectively, both of which are larger than the values of the Gd55Co25Al20 BMG. The mechanism for the improved MCE by minor Sn addition is studied and the field dependence of − ΔSmpeak is investigated for a better understanding on the magneto-caloric behaviors of Gd55Co25Al18Sn2 BMG.
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