Abstract
In this paper, by adding rare-earth (RE) elements to Fe89Zr7B4 ternary amorphous alloy, we obtained a series of Fe87Zr7B4RE2 (RE = Dy, Tb, Gd) amorphous ribbons to further improve the magnetic refrigeration capacity of the basic alloy. Through the heavy RE element substitutions, the glass-formability of the Fe89Zr7B4 alloy was improved effectively. Besides, the Curie temperature Tc of the alloy system increased from 275 K to 342 K, obtaining a roughly linear correlation between the de Gennes factor and Tc. Through the recombination of ribbons with different Tc values, we designed potential amorphous composites with a "table-like" magnetic entropy change curve under different temperatures. This research promises to deepen understanding of the effect of RE additions on the magneto-caloric properties and enhance the performance of Fe-Zr-B amorphous refrigerants around room temperature.
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