First-order nature of a metamagnetic transition and mechanism of giant magnetoresistance in Mn2Sb0.95Sn0.05

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	First-order nature of a metamagnetic transition and mechanism of giant magnetoresistance in Mn2Sb0.95Sn0.05
	Y. Q. Zhang; Z. D. Zhang; J. Aarts
	2004
发表期刊	Physical Review B
ISSN	1098-0121
卷号	70 期号:13
摘要	Magnetization behavior across a metamagnetic transition from an antiferromagnetic state to a ferrimagnetic state is investigated in detail for compound Mn2Sb0.95Sn0.05. The study clearly brings out various generic features associated with a first-order transition, viz., the appearance of hysteresis and the coexistence of magnetic phases. We also observe that the magnetization versus field butterfly loops occurs, while the virgin curve lies outside the envelope magnetization curve. The electronic specific-heat coefficient at low temperatures increases with increasing applied magnetic field, after the field is larger than the critical transition field. This is direct evidence of the formation of a super-zone gap that yields the change of density of electric states and further proves that the large magnetoresistance effect in intermetallic compounds is originated from the reconstruction of Fermi surface due to the collapse of the super-zone gap after the metamagnetic transition.
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.;zhang, yq (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china
关键词	Antiferromagnetic Phase-transition Nanoparticles
URL	查看原文
WOS记录号	WOS:000224855000015
引用统计	被引频次：37[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/321006/35734
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. Q. Zhang,Z. D. Zhang,J. Aarts. First-order nature of a metamagnetic transition and mechanism of giant magnetoresistance in Mn2Sb0.95Sn0.05[J]. Physical Review B,2004,70(13).
APA	Y. Q. Zhang,Z. D. Zhang,&J. Aarts.(2004).First-order nature of a metamagnetic transition and mechanism of giant magnetoresistance in Mn2Sb0.95Sn0.05.Physical Review B,70(13).
MLA	Y. Q. Zhang,et al."First-order nature of a metamagnetic transition and mechanism of giant magnetoresistance in Mn2Sb0.95Sn0.05".Physical Review B 70.13(2004).