Large negative magnetoresistance in quaternary Heusler alloy Ni50Mn8Fe17Ga25 melt-spun ribbons

@article{Liu2005LargeNM,
  title={Large negative magnetoresistance in quaternary Heusler alloy Ni50Mn8Fe17Ga25 melt-spun ribbons},
  author={Zhuhong Liu and Hongchao Liu and Xieqiu Zhang and Xiaokai Zhang and John Q. Xiao and Zhongyunshen Zhu and Xuefang Dai and Guole Liu and Jinglan Chen and Guangheng Wu},
  journal={Applied Physics Letters},
  year={2005},
  volume={86},
  pages={182507}
}
Quaternary Heusler alloy Ni50Mn8Fe17Ga25 ribbons have been prepared by the melt-spun method. The ribbons exhibit large negative magnetoresistance (MR){=[R(H)−R(0)]∕R(0)} over a wide temperature region, particularly in the region during the martensitic phase transformation. The MR decreases significantly after annealing. The large MR is isotropic and is mainly attributed to the local magnetic disorders, magnetic clusters, and heterogeneity. The maximum MR at martensitic transformation may be due… 

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