Martensitic transformation and giant magnetic entropy change in Ni42.8Mn40.3Co5.7Sn11.2 alloy

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 effec...

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Published in中国物理B：英文版 no. 6; pp. 514 - 518
Main Author 陈峰华 宫长伟 郭艳萍 张敏刚 柴跃生
Format Journal Article
LanguageEnglish
Published 01.06.2014
Subjects
合金
外部磁场
奥斯特
晶体结构
磁性测量
磁热效应
磁熵变
马氏体相变
Online AccessGet full text
ISSN1674-1056
2058-3834
DOI10.1088/1674-1056/23/6/067501

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Summary: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.
Bibliography: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.
Chen Feng-Hua, Gong Chang-Wei, Guo Yan-Ping, Zhang Min-Gang, Chai Yue-Sheng（ 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
11-5639/O4
Ni-Mn-Sn, refrigerant capacity, martensitic transition, magnetic entropy change
ISSN:1674-1056
2058-3834
DOI:10.1088/1674-1056/23/6/067501