Giant magnetic refrigeration capacity near room temperature in Ni40Co10Mn40Sn10 multifunctional alloy

Applied Physics Letters - Tập 104 Số 13 - 2014
Linan Huang1,2, Daoyong Cong2, Hongli Suo3, Yandong Wang2
1School of Materials Science and Engineering, Beijing Institute of Technology 2 , Beijing 100081, People's Republic of China
2State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing 1 , No. 30 Xueyuan Rd, Haidian District, Beijing 100083, People's Republic of China
3College of Materials Science and Engineering, Beijing University of Technology 3 , Beijing 100124, People's Republic of China

Tóm tắt

We report a giant effective magnetic refrigeration capacity in a Ni40Co10Mn40Sn10 multifunctional alloy. With a large magnetization difference between austenite and martensite, this alloy shows a strong magnetic field dependence of transformation temperatures. Complete magnetic-field-induced structural transformation and a considerable magnetic entropy change are observed in a broad operating temperature window of 33 K near room temperature. Consequently, an effective magnetic refrigeration capacity of 251 J/kg for 5 T is achieved, which is the largest value for Ni-Mn-based Heusler alloys and comparable to that of the high-performance Gd-Si-Ge and La-Fe-Si magnetocaloric materials. Incorporating the advantages of low cost and non-toxicity, this alloy shows very promising prospects for room-temperature magnetic refrigeration.

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Applied Physics Letters

Tập 104 Số 13

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