Effect of Al Addition on the Glass-Forming Ability and Magnetic Properties of a Gd–Co Binary Amorphous Alloy
Cheng Wu, Ding Ding** , Lei Xia
Laboratory for Microstructure, Institute of Materials, Shanghai University, Shanghai 200072
Abstract ：The glass-forming ability (GFA) and magnetic properties of the Gd$_{50}$Co$_{50}$-based amorphous alloy with Al addition substitution for Co are investigated. It is found that the GFA and magneto-caloric effect of the Gd$_{50}$Co$_{45}$Al$_{5}$ amorphous alloy are better than Gd$_{50}$Co$_{50}$ amorphous alloy. The maximum magnetic entropy change ($-\Delta S_{\rm m}^{\rm peak})$ and the magnetic refrigerant capacity of the amorphous alloy under a field of 5 T are about 6.64 J$\cdot$kg$^{-1}$K$^{-1}$ and 764 J$\cdot$kg$^{-1}$, respectively. The field dependence of magnetic entropy change meets the one predicted by the mean field theory, which is investigated for a better understanding of the magneto-caloric behaviors of the Gd$_{50}$Co$_{45}$Al$_{5}$ amorphous alloy.
收稿日期: 2015-09-28
出版日期: 2016-01-29
:
61.43.Dq
(Amorphous semiconductors, metals, and alloys)
81.05.Kf
(Glasses (including metallic glasses))
75.30.Sg
(Magnetocaloric effect, magnetic cooling)
81.20.-n
(Methods of materials synthesis and materials processing)
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2016, Vol. 33 
