Publikationsdatum:
2015-02-18
Beschreibung:
In this paper, the Ho 20 Er 20 Co 20 Al 20 RE 20 (RE = Gd, Dy, and Tm) high-entropy bulk metallic glasses (HE-BMGs) with good magnetocaloric properties are fabricated successfully. The HE-BMGs exhibit a second-order magnetic phase transition. The peak of magnetic entropy change ( Δ S M pk ) and refrigerant capacity ( RC ) reaches 15.0 J kg −1 K −1 and 627 J kg −1 at 5 T, respectively, which is larger than most rare earth based BMGs. The heterogeneous nature of glasses also contributes to the large Δ S M pk and RC . In addition, the magnetic ordering temperature, Δ S M pk and RC can be widely tuned by alloying different rare earth elements. These results suggest that the HE-BMGs are promising magnetic refrigerant at low temperatures.
Print ISSN:
0021-8979
Digitale ISSN:
1089-7550
Thema:
Physik
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