Anomalous positive magnetoresistance in Fe0.75Mn1.35As

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	Anomalous positive magnetoresistance in Fe0.75Mn1.35As
	N. K. Sun; Y. B. Li; D. Li; Q. Zhang; W. J. Feng; Z. D. Zhang
	2006
发表期刊	Physical Review B
ISSN	1098-0121
卷号	74 期号:17
摘要	With increasing temperature, tetragonal Fe0.75Mn1.35As compound exhibits a first-order phase transition at T-s=165 K from a ferrimagnetic (FI) phase with a large unit-cell volume to an antiferromagnetic (AF) phase with a small unit-cell volume. An external magnetic field induces a metamagnetic transition from the AF to the FI state above T-s, stabilizing the phase with the larger cell volume. With increasing the number of warming and cooling cycles, the resistivity curve, rho(T), shifts to higher values, and this shift is ascribed to a pronounced reduction of the mean-free path of electron scattering. After several thermocycles, a large, irreversible lattice expansion of c axis of 0.18% occurs. The positive magnetoresistance ratios as large as 12% and 6% for the first magnetic-field cycles are observed at 170 and 167 K, respectively, at 5 T. The overall magnetotransport behaviors on the subsequently second and third magnetic-field cycles at 170 K are similar to that in the first magnetic-field cycle, but with MR ratios of only 1.6% and 0.6%, respectively, at 5 T.
部门归属	chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. chinese acad sci, int ctr mat phys, shenyang 110016, peoples r china.;sun, nk (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china
关键词	Negative Magnetoresistance Giant Magnetoresistance Magnetic Transition Phase-transition Metals Mn2as
URL	查看原文
WOS记录号	WOS:000242409000016
引用统计	被引频次：10[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/321006/34475
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	N. K. Sun,Y. B. Li,D. Li,et al. Anomalous positive magnetoresistance in Fe0.75Mn1.35As[J]. Physical Review B,2006,74(17).
APA	N. K. Sun,Y. B. Li,D. Li,Q. Zhang,W. J. Feng,&Z. D. Zhang.(2006).Anomalous positive magnetoresistance in Fe0.75Mn1.35As.Physical Review B,74(17).
MLA	N. K. Sun,et al."Anomalous positive magnetoresistance in Fe0.75Mn1.35As".Physical Review B 74.17(2006).