Phase Transitions, Magnetocaloric Effect and Magnetoresistance in Ni-Co-Mn-Sn Ferromagnetic Shape Memory Alloy

被引：47
作者：
Han, Zhida [1 ,2 ,3 ]
Wang, Dunhui [3 ]
Qian, Bin [1 ,2 ]
Feng, Jinfu [1 ,2 ]
Jiang, Xuefan [1 ,2 ]
Du, Youwei [3 ]
机构：
[1] Changshu Inst Technol, Dept Phys, Changshu 215500, Peoples R China
[2] Changshu Inst Technol, Jiangsu Lab Adv Funct Mat, Changshu 215500, Peoples R China
[3] Nanjing Univ, Dept Phys, Nanjing 210093, Peoples R China
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS | 2010年 / 49卷 / 01期
基金：
中国博士后科学基金; 中国国家自然科学基金;
关键词：
ROOM-TEMPERATURE; TRANSFORMATION; RECOVERY;
D O I：
10.1143/JJAP.49.010211
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The phase transitions, magnetocaloric effect and magnetoresistance in Ni43Mn46-xCoxSn11 (x = 0-5) ferromagnetic shape memory alloys were investigated. With the increase of Co concentration, the temperatures of martensitic transformation and magnetic transition in austenitic phase increase rapidly, while the magnetic transition temperature in martensitic phase shows a small decrease. In Ni43Mn41Co5Sn11, a giant magnetic entropy change of 19.1 J/(kg.K) in the magnetic field of 10 kOe at 294 K, as well as a large magnetoresistance of -59% for the field change of 50 kOe at 281 K, is observed. These interesting phenomena are associated with the sudden changes of magnetization and resistance near the martensitic transition temperature. These results make the low-cost Ni-Mn-Co-Sn have promising application in magnetic refrigeration and magnetic sensor. (C) 2010 The Japan Society of Applied Physics
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页数：3
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