Magnetoresistance in ferromagnetic shape memory alloy NiMnFeGa

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	Magnetoresistance in ferromagnetic shape memory alloy NiMnFeGa
	Liu, ZH ; Ma, XQ ; Zhu, ZY ; Luo, HZ ; Liu, GD ; Chen, JL ; Wu, GH ; Zhang, XK ; Xiao, JQ
刊名	JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
	2011
卷号	323 期号:16 页码:2192
关键词	LARGE NEGATIVE MAGNETORESISTANCE HALF-METALLIC FERROMAGNETS QUATERNARY HEUSLER ALLOY MARTENSITIC-TRANSFORMATION MAGNETIC-PROPERTIES SINGLE-CRYSTALS NI2MNGA SYSTEMS GA
ISSN号	0304-8853
通讯作者	Wu, GH: Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100080, Peoples R China.
中文摘要	The magnetoresistance (MR){=[R(H) - R(0)]/R(0)} properties in ferromagnetic shape memory alloy of NiMnFeGa ribbons and single crystals, and NiFeGa ribbons have been investigated. It is found that the NiMnFeGa melt-spun ribbon exhibited GMR effect, arising from the spin-dependent scattering from magnetic inhomogeneities consisting of antiferromagnetically coupled Mn atoms in B2 structure. In the absence of these magnetic inhomogeneities, Heusler alloys seem to show a common linear MR behavior at around 0.8T(C), regardless of sample structures. This may be explained by the s-d model. At low temperatures, conventional AMR behaviors due to the spin-orbital coupling are observed. This is most likely due to the diminished MR from s-d model because of much less spin fluctuation, and is not associated with martensite phase. MR anomaly at intermediate field (rho(perpendicular to) > rho(parallel to)) is also observed in single crystal samples, which may be related to unique features of Heusler alloys. (C) 2011 Elsevier B.V. All rights reserved.
收录类别	SCI
资助信息	National Natural Science Foundation of China [50971130]
语种	英语
公开日期	2013-09-18
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/41671]
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	Liu, ZH,Ma, XQ,Zhu, ZY,et al. Magnetoresistance in ferromagnetic shape memory alloy NiMnFeGa[J]. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS,2011,323(16):2192.
APA	Liu, ZH.,Ma, XQ.,Zhu, ZY.,Luo, HZ.,Liu, GD.,...&Xiao, JQ.(2011).Magnetoresistance in ferromagnetic shape memory alloy NiMnFeGa.JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS,323(16),2192.
MLA	Liu, ZH,et al."Magnetoresistance in ferromagnetic shape memory alloy NiMnFeGa".JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS 323.16(2011):2192.