a College of Mechanical Engineering, Heavy Machinery Engineering Research Center of Ministry of Education of China, Taiyuan University of Science and Technology, Taiyuan 030024, China; b College of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China; c Department of Physics, School of Applied Science, Taiyuan University of Science and Technology, Taiyuan 030024, China
Abstract The crystal structure, phase transition, and magnetocaloric effect in Ni42.8Mn40.3Co5.7Sn11.2 alloy are investigated by structure analysis and magnetic measurements. A large magnetic entropy change of 45.6 J/kg·K is obtained at 215 K under a magnetic field of 30 kOe (1 Oe = 79.5775 A·m-1). The effective refrigerant capacity of Ni42.8Mn40.3Co5.7Sn11.2 alloy reaches 72.1 J/kg under an applied field changing from 0 to 30 kOe. The external magnetic field shifts the martensitic transition temperature about 3-4 K/10 kOe towards low temperature, indicating that magnetic field can retard the phase transition to a certain extent. The origin of large magnetic entropy change is discussed in the paper.
Received: 22 September 2013
Revised: 08 December 2013
Accepted manuscript online:
PACS:
75.30.Sg
(Magnetocaloric effect, magnetic cooling)
Fund: Project supported by the Natural Science Foundation of Shanxi Province, China (Grant No. 2010011032-1), the Specialized Research Fund for Doctoral Scientific Research of Ministry of Education of China (Grant No. 201014151110003), the Doctoral Scientific Research Foundation of Taiyuan University of Science and Technology, China (Grant No. 20122036), the Postdoctoral Research Station Foundation of Taiyuan University of Science and Technology, China, the Research Project Supported by Shanxi Scholarship Council, China (Grant No. 2013-098), the Graduate Student Innovation Project of Shanxi Province, China (Grant No. 20133114), the National Natural Science Foundation of China (Grant No. 51375325), and the National Key Basic Research Program of China (Grant No. 2012CB722801).
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