Synthesis, structure and magnetic properties of DyAl2 nanoparticles

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	Synthesis, structure and magnetic properties of DyAl2 nanoparticles; Synthesis, structure and magnetic properties of DyAl2 nanoparticles
	W. S. Zhang; E. Bruck; Z. D. Zhang; O. Tegus; W. F. Li; P. Z. Si; D. Y. Geng; J. C. P. Klaasse; K. H. J. Buschow
	2006 ; 2006
发表期刊	Journal of Alloys and Compounds ; Journal of Alloys and Compounds
ISSN	0925-8388 ; 0925-8388
卷号	413 期号:1-2 页码:29-34
摘要	DyAl2 nanoparticles have been prepared by means of are discharge in a mixture of argon and hydrogen gas. The Structure of DyAl2 nanoparticles is studied by means of X-ray diffraction, X-ray photoelectron spectroscopy, and high-resolution transmission electron rnicroscopy. X-ray photoelectron spectroscopy shows that the as-prepared DyAl2 nanoparticles are coated with a layer of Al2O3 phase on the surface, and their sizes vary from 20 nm to about 100 nm. The DyAl2 nanoparticles exhibit ferromagnetic properties that are different from bulk DyAl2 compound. The gradual decrease of the magnetization with increasing temperature in a wide temperature range reveals the size distribution ofthe DyAl2 nanoparticles. The magnetic-entropy changes are derived from the isothermal magnetization curves measured at different temperatures. The magnetic-entropy change of the DyAl2 nanoparticles is lower than that of the bulk DyAl2 material but has a broadened peak. (c) 2005 Elsevier B.V. All rights reserved.; DyAl2 nanoparticles have been prepared by means of are discharge in a mixture of argon and hydrogen gas. The Structure of DyAl2 nanoparticles is studied by means of X-ray diffraction, X-ray photoelectron spectroscopy, and high-resolution transmission electron rnicroscopy. X-ray photoelectron spectroscopy shows that the as-prepared DyAl2 nanoparticles are coated with a layer of Al2O3 phase on the surface, and their sizes vary from 20 nm to about 100 nm. The DyAl2 nanoparticles exhibit ferromagnetic properties that are different from bulk DyAl2 compound. The gradual decrease of the magnetization with increasing temperature in a wide temperature range reveals the size distribution ofthe DyAl2 nanoparticles. The magnetic-entropy changes are derived from the isothermal magnetization curves measured at different temperatures. The magnetic-entropy change of the DyAl2 nanoparticles is lower than that of the bulk DyAl2 material but has a broadened peak. (c) 2005 Elsevier B.V. All rights reserved.
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. univ amsterdam, van waals zeeman inst, nl-1018 xe amsterdam, netherlands.;zhang, ws (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china;wszhangimr@hotmail.com ; 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. univ amsterdam, van waals zeeman inst, nl-1018 xe amsterdam, netherlands.;zhang, ws (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china;wszhangimr@hotmail.com
关键词	Nanostructures Nanostructures Vapour Deposition Vapour Deposition Transmission Electron Microscopy Transmission Electron Microscopy Magnetic Measurements Magnetic Measurements Arc-discharge Arc-discharge Fe-co(c) Nanocapsules Fe-co(c) Nanocapsules Particles Particles Refrigeration Refrigeration
URL	查看原文 ; 查看原文
WOS记录号	WOS:000236312900006 ; WOS:000236312900006
引用统计	被引频次：5[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/321006/34713
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	W. S. Zhang,E. Bruck,Z. D. Zhang,et al. Synthesis, structure and magnetic properties of DyAl2 nanoparticles, Synthesis, structure and magnetic properties of DyAl2 nanoparticles[J]. Journal of Alloys and Compounds, Journal of Alloys and Compounds,2006, 2006,413, 413(1-2):29-34, 29-34.
APA	W. S. Zhang.,E. Bruck.,Z. D. Zhang.,O. Tegus.,W. F. Li.,...&K. H. J. Buschow.(2006).Synthesis, structure and magnetic properties of DyAl2 nanoparticles.Journal of Alloys and Compounds,413(1-2),29-34.
MLA	W. S. Zhang,et al."Synthesis, structure and magnetic properties of DyAl2 nanoparticles".Journal of Alloys and Compounds 413.1-2(2006):29-34.