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. |
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