Tuning martensitic transformation and large magnetoresistance in Ni50−xCuxMn38Sn12 Heusler alloys
Tuning martensitic transformation and large magnetoresistance in Ni50−xCuxMn38Sn12 Heusler alloys
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DOI：
10.1063/1.4803496
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发表时间：
2013-05
影响因子：
3.2
通讯作者：
C. Jing;Y. J. Yang;Zhen Li;Xiaoling Wang;B. Kang;S. Cao;J. Zhang;J. Zhu;B. Lu
中科院分区：
文献类型：
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作者：
C. Jing;Y. J. Yang;Zhen Li;Xiaoling Wang;B. Kang;S. Cao;J. Zhang;J. Zhu;B. Lu
本文制备了多晶Ni50−xCuxMn38Sn12合金（x = 0,2,4,6）。研究了Cu掺杂对合金马氏体相变和磁性能的影响。实验结果表明，随着Cu取代Ni的增加，马氏体相变温度降低，居里温度升高。因此，合金中的Cu含量可以调节奥氏体和马氏体相的磁性能。此外，还对磁阻进行了详细的计算和讨论。通过磁场诱导的反向马氏体相变获得了较大的磁电阻（可达39%）。
In this paper, polycrystalline Ni50−xCuxMn38Sn12 alloys (x = 0, 2, 4, 6) were prepared. The influence of Cu doping on the martensitic transformation and magnetic properties were investigated in these alloys. Experimental results indicate that the martensitic transformation temperature decreases and the Curie temperature increases with the increasing of substitution of Cu for Ni. Therefore, the magnetic properties in both austenitic and martensitic phases could be tuned by Cu content in these alloys. In addition, magnetoresistance were also performed and discussed in detail. A large magnetoresistance (up to 39%) was obtained by the magnetic field induced reverse martensitic transformation.