Large room temperature adiabatic temperature variation in a Ni^sub 40^Co^sub 8^Mn^sub 42^Sn^sub 10^ polycrystalline alloy

For the potential applications in magnetic refrigeration, low-cost and high-performance refrigerants with large magnetocaloric effect at relatively lower field change are highly desired. In this work, we report a large adiabatic temperature variation for a low-field change of 1.5 T near room tempera...

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Bibliographic Details
Published in:Intermetallics 2018-09, Vol.100, p.57
Main Authors: Li, Zongbin, Li, Zhenzhuang, Yang, Jiajing, Yang, Bo, Zhao, Xiang, Zuo, Liang
Format: Article
Language:English
Subjects:
Adiabatic flow
Ferromagnetism
Magnetism
Manganese
Martensite
Nickel
Nickel alloys
Polycrystals
Refrigeration
Room temperature
Temperature
Tin base alloys
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Summary:For the potential applications in magnetic refrigeration, low-cost and high-performance refrigerants with large magnetocaloric effect at relatively lower field change are highly desired. In this work, we report a large adiabatic temperature variation for a low-field change of 1.5 T near room temperature in a Ni40Co8Mn42Sn10 bulk alloy. With the large magnetization difference between weak magnetic martensite and ferromagnetic austenite, this alloy exhibits significant inverse magnetocaloric effect. Under the field change of 5 T, large magnetic entropy change ΔSM of 21.6 J kg−1K−1 and effective refrigeration capacity RCeff of 293 J kg−1 were achieved. Moreover, a large ΔTad up to −4.4 K was obtained under the low-field change of 1.5 T, which is much higher than previously reported ΔTad values in Ni-Mn-Sn based alloys.
ISSN:0966-9795
1879-0216