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崔玉亭,游素琴,武 亮,马 勇,孔春阳,杨晓红,潘复生.Ni46Mn35Ga19单晶大的磁熵变和磁控形状记忆效应[J].稀有金属材料与工程(英文),2010,39(2):189~193.[Cui Yuting,You Suqin,Wu Liang,Ma Yong,Kong Chunyang,Yang Xiaohong,Pan Fusheng.Large Magnetic Entropy Change and Magnetic-Controlled Shape Memory Effect in Single Crystal Ni46Mn35Ga19[J].Rare Metal Materials and Engineering,2010,39(2):189~193.]
Large Magnetic Entropy Change and Magnetic-Controlled Shape Memory Effect in Single Crystal Ni46Mn35Ga19
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Received:September 18, 2009  
DOI:
Key words: shape memory effect  magnetic entropy change  magnetic transition  martensitic transformation
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Author NameAffiliation
Cui Yuting Chongqing Normal University, Chongqing 400047, China 
You Suqin Chongqing Normal University, Chongqing 400047, China 
Wu Liang Chongqing Normal University, Chongqing 400047, China 
Ma Yong Chongqing Normal University, Chongqing 400047, China 
Kong Chunyang Chongqing Normal University, Chongqing 400047, China 
Yang Xiaohong Chongqing Normal University, Chongqing 400047, China 
Pan Fusheng Chongqing University, Chongqing 400044, China 
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Abstract:
      Physical properties of Ni46Mn35Ga19 single crystal with transition temperatures above room temperature were investigated by various measuring methods. The measuring results of the resistance and ac susceptibility indicate that the magnetic transition and martensitic transformation can occur simultaneously in this alloy. The measurements of the isothermal magnetization show that the increasing rate of magnetic entropy change in this alloy is 9.0 J / kg·K·T. A large magnetic entropy change of 13.8 J/kg·K is obtained under the field of 1.6 T in the single crystal. Furthermore, the strain measurement shows that accompanying with magnetic entropy change, the alloy exhibits a large spontaneous transition strain of –0.89% and a large magnetic-field-enhanced strain of –1.90%.