Abstract
The Gd25Co25Al25Ho25-xYx (x = 1, 5, 10, and 15) high entropy metallic glasses are fabricated by copper-mold quenching technique. Substituting moderately Ho with Y effectively improves the glass-forming ability, magnetic entropy change (|ΔSM|), and magnetic refrigeration capacity (RC) of Gd25Co25Al25Ho25-xYx. Besides, the Curie temperature of this quaternary alloy can be tuned from 51 to 41 K with Y addition. Among these alloys, Gd25Co25Al25Ho20Y5 exhibits the largest peak value of |ΔSM| up to 8.79 J kg−1K−1 and the corresponding RC up to 547 J kg−1 under a magnetic field of 5 T. It is worthy to note that a reverse changing trend can be observed between the maximum |ΔSM| and the temperature range of magnetic transition, which may be ascribed to the spatial inhomogeneity induced by yttrium microalloying. Our studies show that yttrium is an effective element to manipulate magnetocaloric properties of high entropy metallic glasses as potential refrigerants.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
