Large Magnetoresistance and Magnetic Field Induced Strain in Ni42.8Co7.7Mn38.8Al10.7 Heusler Alloy at Room Temperature

被引：7
作者：
Xuan, Haicheng [1 ]
Zhang, Tuo [1 ]
Wu, Yafei [1 ]
Agarwal, Sandeep [2 ]
Yang, Huali [2 ]
Wen, Xingcheng [2 ]
Wei, Jiafeng [2 ]
Han, Peide [1 ]
Du, Youwei [1 ]
机构：
[1] Taiyuan Univ Technol, Coll Mat Sci & Engn, Minist Educ, Key Lab Interface Sci & Engn Adv Mat, Taiyuan 030024, Shanxi, Peoples R China
[2] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, CAS Key Lab Magnet Mat & Devices, Ningbo 315201, Zhejiang, Peoples R China
来源：
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE | 2018年 / 215卷 / 18期
基金：
国家重点研发计划; 中国国家自然科学基金;
关键词：
Heusler alloys; magnetic field induced strains; magnetoresistance; martensitic transformation; Ni-Co-Mn-Al; SHAPE-MEMORY ALLOYS; INVERSE; SN; TRANSFORMATION;
D O I：
10.1002/pssa.201800185
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Large magnetoresistance and large magnetic field induced strain are observed in polycrystalline Ni42.8Co7.7Mn38.8Al10.7 Heusler alloy. The martensitic transformation from ferromagnetic austenite to weak-magnetic martensite is realized in the alloy around the room temperature. A magentoresistance of -45% and magnetic field induced strain up to -500ppm are observed under the magnetic field of 90kOe. The evolution of the topography and magnetic domain is measured by magnetic force microscopy under different magnetic fields. Dramatic changes in magnetic domain structures are observed and discussed in the martensitic transformation process. The magnetic field induced reverse martensitic transformation should account for the large magnetoresistance and magnetic field induced strain. The results indicate the potential application of Ni42.8Co7.7Mn38.8Al10.7 alloy in magnetic multifunctional materials.
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页数：6
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