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Title: High-entropy bulk metallic glasses as promising magnetic refrigerants

In this paper, the Ho{sub 20}Er{sub 20}Co{sub 20}Al{sub 20}RE{sub 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 (ΔS{sub M}{sup pk}) and refrigerant capacity (RC) reaches 15.0 J kg{sup −1} K{sup −1} and 627 J kg{sup −1} at 5 T, respectively, which is larger than most rare earth based BMGs. The heterogeneous nature of glasses also contributes to the large ΔS{sub M}{sup pk} and RC. In addition, the magnetic ordering temperature, ΔS{sub M}{sup 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.
Authors:
; ; ; ; ; ; ;  [1] ;  [2] ;  [1] ;  [2] ;  [3]
  1. Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang 315201 (China)
  2. (China)
  3. (Japan)
Publication Date:
OSTI Identifier:
22413129
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 7; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALUMINIUM ALLOYS; CAPACITY; COBALT ALLOYS; ENTROPY; MAGNETIC PROPERTIES; MAGNETIZATION; METALLIC GLASSES; PHASE TRANSFORMATIONS; RARE EARTH ALLOYS; REFRIGERANTS