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Achieving better glass-forming ability and magnetocaloric effect in the minor Zr-substituted Gd $_{50}$ $_{50}$ Co $_{50}$ $_{50}$ amorphous alloy

Li Yan Ma

Laboratory for Microstructure, Institute of Materials, Shanghai University, Shanghai 200072, P. R. China

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Liang Hua Gan

Laboratory for Microstructure, Institute of Materials, Shanghai University, Shanghai 200072, P. R. China

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Lei Xia

Laboratory for Microstructure, Institute of Materials, Shanghai University, Shanghai 200072, P. R. China

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JiaZheng Zhang

China Standard Certification (Beijing) Co. Ltd., Beijing 102218, P. R. China

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, and

Ding Ding

Laboratory for Microstructure, Institute of Materials, Shanghai University, Shanghai 200072, P. R. China

E-mail Address: d.ding@shu.edu.cn

Corresponding author.

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https://doi.org/10.1142/S0217979218500856Cited by:1 (Source: Crossref)

Abstract

The glass-forming ability (GFA) and magnetic properties of the minor Zr-substituted Gd $_{50}$ $_{50}$ Co $_{50}$ $_{50}$ amorphous alloy were investigated. The Gd $_{50}$ $_{50}$ Co $_{48}$ $_{48}$ Zr₂ amorphous ribbons prepared by melt-spinning show better GFA. With increasing minor Zr addition, the Gd $_{50}$ $_{50}$ Co $_{48}$ $_{48}$ Zr₂ amorphous ribbons possessed higher magnetic entropy change peak ( $- Δ$ $- Δ$ S $_{m}^{peak}$ $_{m}^{peak}$ = 3.9 Jkg $^{- 1}$ $^{- 1}$ K $^{- 1}$ $^{- 1}$ , under 5 T) but lower Curie temperature (T $_{c}$ $_{c}$ = 231 K) than the Gd $_{50}$ $_{50}$ Co $_{50}$ $_{50}$ amorphous alloy. The mechanism for the improved GFA, magnetocaloric effect (MCE) and the decrease in T $_{c}$ $_{c}$ was investigated. Finally, combined with other Gd-based amorphous ribbons, the Gd $_{50}$ $_{50}$ Co $_{48}$ $_{48}$ Zr₂ amorphous alloy was employed to construct amorphous composites to achieve a table-like magnetic entropy change profile, which can provide optimal efficiency when utilizing an Ericsson thermodynamic cycle.

Keywords:

PACS: 61.43.Dq, 81.05.Kf, 75.30.Sg, 81.20.n

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