Crossover of magnetoresistance in the zero-gap half-metallic Heusler alloy Fe2CoSi

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	Crossover of magnetoresistance in the zero-gap half-metallic Heusler alloy Fe2CoSi
	Du, Y ; Xu, GZ ; Zhang, XM ; Liu, ZY ; Yu, SY ; Liu, EK ; Wang, WH ; Wu, GH
刊名	EPL
	2013
卷号	103 期号:3
ISSN号	0295-5075
通讯作者	Du, Y (reprint author), Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, State Key Lab Magnetism, Beijing 100190, Peoples R China.
中文摘要	This work reports on band structure and magneto-transport investigations of the inverse Heusler compound Fe2CoSi. First-principles calculations show that Fe2CoSi has a very peculiar band structure with a conducting property of the majority spin channel and a nearly zero bandgap in the minority spin channel. The prepared Fe2CoSi sample possesses a highly ordered inverse Heusler structure with a magnetic moment of 4.92 mu(B) at 5K and a high Curie temperature of 1038 K. With increasing temperature, a crossover from positive to negative magnetoresistance (MR) is observed. Combining this with the Hall effect measurements, we suggest that the intriguing crossover of the MR can be ascribed to the dominant spin carriers that change from the gapless minority spin channel to the majority spin channel at the Fermi level. Copyright (C) EPLA, 2013
资助信息	National Basic Research Program of China (973 Program) [2012CB619405]; National Natural Science Foundation of China [51071172, 51171207, 51171206]
语种	英语
公开日期	2014-01-16
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/56854]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Du, Y,Xu, GZ,Zhang, XM,et al. Crossover of magnetoresistance in the zero-gap half-metallic Heusler alloy Fe2CoSi[J]. EPL,2013,103(3).
APA	Du, Y.,Xu, GZ.,Zhang, XM.,Liu, ZY.,Yu, SY.,...&Wu, GH.(2013).Crossover of magnetoresistance in the zero-gap half-metallic Heusler alloy Fe2CoSi.EPL,103(3).
MLA	Du, Y,et al."Crossover of magnetoresistance in the zero-gap half-metallic Heusler alloy Fe2CoSi".EPL 103.3(2013).