| 要約: | In this work, a series of Gd-based amorphous/crystalline composite fibers (ANCFs) were prepared by regulating the Gd content in Gd-Co-Al alloys using the melt-extracted method. Compared to the amorphous alloy, the ANCFs display excellent magnetic refrigeration capacity (<i>RC</i>). Among them, Gd<sub>85</sub>Co<sub>5</sub>Al<sub>10</sub> ANCF had the largest <i>RC</i> (841 J kg<sup>−1</sup>) and the widest working temperature range (245 K). Compared with Gd<sub>70</sub>Co<sub>10</sub>Al<sub>20</sub>, <i>RC</i> and working temperature range increased by 56% and 119%, respectively. This superior property is attributed to the ideal coupling between the amorphous phase and the crystalline. This result opens a new door to optimize the magnetic refrigeration capacity by controlling the amorphous crystalline composite structure.
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