Journal
METALS
Volume 12, Issue 9, Pages -Publisher
MDPI
DOI: 10.3390/met12091399
Keywords
metallic glass; glass-forming ability; magnetocaloric effect; magnetic entropy change
Funding
- National Natural Science Foundation of China [51871139, 52071196]
- Key Research & Development plan of Anhui Province [2022a05020016]
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This paper investigates the glass-forming ability and magnetic properties of Tb65Ni35-xCox amorphous ribbons. The T-rg and gamma of the ribbons reach their maximum when x = 20, indicating the optimal glass-forming ability of the Tb65Ni15Co20 amorphous alloy. The amorphous alloy exhibits a Curie temperature of approximately 79 K and shows typical spin-glass-like behavior. The magnetic entropy change peak value is up to 9.47 J kg(-1) K-1 under 5 T.
In the paper, Tb65Ni35-xCox (x = 0, 10, 20, 30) amorphous ribbons were successfully prepared, and the glass-forming ability (GFA) of these ribbons was investigated. Both the T-rg and gamma of the Tb65Ni35-xCox amorphous ribbons were larger than those of the Tb65Ni35 alloy and reached the maximum when x = 20, indicating that the Tb65Ni15Co20 amorphous alloy has an optimal GFA. The magnetic properties as well as magnetocaloric effect of the Tb65Ni15Co20 amorphous alloy were studied. The Curie temperature (T-c) of the amorphous alloy was similar to 79 K and the typical spin-glass-like behavior was found in the alloy. The peak value of magnetic entropy change (-Delta(peak)(m)) for the amorphous alloy was up to 9.47 J kg(-1) K-1 under 5 T. The mechanism for the increased T-c and enlarged -Delta S-m(peak) of the Tb65Ni15Co20 amorphous alloy was analyzed.
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