Structural and magnetic properties of Mn nanoparticles prepared by arc-discharge

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	Structural and magnetic properties of Mn nanoparticles prepared by arc-discharge
	P. Z. Si; E. Bruck; Z. D. Zhang; O. Tegus; W. S. Zhang; K. H. J. Buschow; J. C. P. Klaasse
	2005
发表期刊	Materials Research Bulletin
ISSN	0025-5408
卷号	40 期号:1 页码:29-37
摘要	Mn nanoparticles are prepared by arc discharge technique. MnO, alpha-Mn, beta-Mn, and gamma-Mn are detected by X-ray diffraction, while the presence of Mn3O4 and MnO2 is revealed by X-ray photoelectron spectroscopy. Transmission electron microscopy observations show that most of the Mn nanoparticles have irregular shapes, rough surfaces and a shell/core structure, with sizes ranging from several nanometers to 80 nm. The magnetic properties of the Mn nanoparticles are investigated between 2 and 350 K at magnetic fields up to 5 T. A magnetic transition occurring near 43 K is attributed to the formation of the ferrimagnetic Mn3O4. The coercivity of the Mn nanoparticles, arising mainly from Mn3O4, decreases linearly with increasing temperature below 40 K. Below the blocking temperature T-B approximate to 34 K, the hysteresis loops exhibit large coercivity (up to 500 kA/m), owing to finite size effects, and irreversibility in the loops is found up to 4 T, and magnetization is not saturated up to 5 T. The relationship between structure and the magnetic properties are discussed. (C) 2004 Elsevier Ltd. All rights reserved.
部门归属	chinese acad sci, int ctr mat phys, met res inst, shenyang natl lab mat sci, shenyang 110016, peoples r china. univ amsterdam, van der waals zeeman inst, nl-1018 xe amsterdam, netherlands.;si, pz (reprint author), chinese acad sci, int ctr mat phys, met res inst, shenyang natl lab mat sci, shenyang 110016, peoples r china;psi@science.uva.nl
关键词	Magnetic Materials Nanostructures X-ray Diffraction Magnetic Properties Gamma-fe2o3 Nanoparticles Nanocapsules Manganese Transition Particles Clusters Methane Lattice Mn3o4
URL	查看原文
WOS记录号	WOS:000226258300004
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/321006/35031
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	P. Z. Si,E. Bruck,Z. D. Zhang,et al. Structural and magnetic properties of Mn nanoparticles prepared by arc-discharge[J]. Materials Research Bulletin,2005,40(1):29-37.
APA	P. Z. Si.,E. Bruck.,Z. D. Zhang.,O. Tegus.,W. S. Zhang.,...&J. C. P. Klaasse.(2005).Structural and magnetic properties of Mn nanoparticles prepared by arc-discharge.Materials Research Bulletin,40(1),29-37.
MLA	P. Z. Si,et al."Structural and magnetic properties of Mn nanoparticles prepared by arc-discharge".Materials Research Bulletin 40.1(2005):29-37.