Abstract
In this study, we have successfully improved the Curie temperature of Gd50Co50 amorphous alloy from 267K to 277K by a minor Fe addition as a replacement for Co. The Gd50Co48Fe2 as-spun ribbons exhibit typical characteristics of a soft magnetic amorphous alloy. The magnetic entropy change peak for this amorphous alloy was slightly decreased by the minor Fe addition, but the adiabatic temperature rise (ΔTad) of the Gd50Co48Fe2 amorphous alloy is comparable to that of the Gd50Co50 amorphous alloy, both of which are larger than those of other metallic glasses near the ice point of water. The maximum ΔTad of the Gd50Co48Fe2 amorphous ribbon at 277.5K is about 1.44K under 1T, 2.44K under 2T, 3.31K under 3T, 4.1K under 4T and about 4.84K under 5T. The large maximum value of ΔTad above the ice point indicates that the Gd50Co48Fe2 amorphous alloy could be an ideal candidate for the high efficient magnetic refrigerant in a household refrigerator.
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