Abnormal magnetoresistance in epsilon-(Mn1-xFex)(3.25)Ge antiferromagnets

doi:10.1103/PhysRevB.76.094401

IMR OpenIR

	Abnormal magnetoresistance in epsilon-(Mn1-xFex)(3.25)Ge antiferromagnets
	Du, Juan ; Li, Da ; Li, Yao-Biao ; Sun, Nai-Kun ; Li, Ji ; Zhang, Zhi-Dong
通讯作者	Du, Juan()
	2007-09-01
发表期刊	PHYSICAL REVIEW B
ISSN	1098-0121
卷号	76 期号:9 页码:5
摘要	The magnetic, transport and magnetotransport properties of antiferromagnetic epsilon-(Mn1-xFex)(3.25)Ge (x=0.17 and 0.2) compounds are investigated systematically. For both compounds, a large positive magnetoresistance (MR) is observed in the temperature regime below the temperature (T-t) for a transition from a triangular to a collinear antiferromagnetic spin configuration, while a negative magnetoresistance appears between T-t and the Neel temperature T-N, and then the MR ratio turns to be positive again above T-N. Below T-t, the positive MR reaches a maximum ratio of 6.1% at 5 K at an applied magnetic field of 5 T for the epsilon-(Mn0.83Fe0.17)(3.25)Ge compound. For the epsilon-(Mn0.83Fe0.2)(3.25)Ge compound, the positive MR ratio reaches its maximum at 120 K and nearly vanishes at 5 K. The origin of the anomalous positive and negative MR effects is discussed in terms of the shrinkage of the orbits, the spin fluctuations, the spin configurations, and the magnetic transitions.
DOI	10.1103/PhysRevB.76.094401
收录类别	SCI
语种	英语
WOS研究方向	Physics
WOS类目	Physics, Condensed Matter
WOS记录号	WOS:000249786100047
出版者	AMER PHYSICAL SOC
引用统计	被引频次：20[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/90718
专题	中国科学院金属研究所
通讯作者	Du, Juan
作者单位	1.Chinese Acad Sci, Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Int Ctr Mat Phys, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Du, Juan,Li, Da,Li, Yao-Biao,et al. Abnormal magnetoresistance in epsilon-(Mn1-xFex)(3.25)Ge antiferromagnets[J]. PHYSICAL REVIEW B,2007,76(9):5.
APA	Du, Juan,Li, Da,Li, Yao-Biao,Sun, Nai-Kun,Li, Ji,&Zhang, Zhi-Dong.(2007).Abnormal magnetoresistance in epsilon-(Mn1-xFex)(3.25)Ge antiferromagnets.PHYSICAL REVIEW B,76(9),5.
MLA	Du, Juan,et al."Abnormal magnetoresistance in epsilon-(Mn1-xFex)(3.25)Ge antiferromagnets".PHYSICAL REVIEW B 76.9(2007):5.