Journal
INTERMETALLICS
Volume 93, Issue -, Pages 67-71Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.intermet.2017.11.007
Keywords
Gd-based metallic glasses; Glass-forming ability; Magnetocaloric effect; Refrigerant capacity
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Funding
- National Natural Science Foundation of China [51471050, 51631003]
- Scientific Research Foundation of Graduate School of Southeast University [YBJJ1673]
- Jiangsu Key Laboratory for Advanced Metallic Materials [BM2007204]
- Natural Science Foundation of Jiangsu Province [BK20150170, BK20171354]
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In this work, we report on the systematic variation of the glass-forming ability (GFA) and magnetocaloric effect (MCE) in Gd55Co20-xAl24Si1Fex (x = 0, 1, 2, 3, 4 and 5 at%) metallic glasses (MGs), which are potential candidates for magnetocaloric cooling applications. The addition of Fe broadens the full width of half maximum of magnetic entropy change (delta T-FWHM), thereby greatly increases the refrigeration capacity (RC). Accordingly, the delta T-FWHM as large as 118 K, magnetic entropy change vertical bar Delta S-M vertical bar of 7.26 J kg(-1)K(-1) at 130 K, and corresponding large RC of 857 J kg(-1) under applied field of 5 T are obtained for the composition with 5 at% Fe substitution. By increasing the atomic fraction of Fe dopants, the Curie temperature T-c increases systematically at the same time. Such high GFA of novel Gd-based MGs with large MCE makes them attractive candidates for magnetic refrigeration applications in the future.
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