Structure and magnetic properties of Cr(N)-beta-Cr2N nanoparticles prepared by arc-discharge

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	Structure and magnetic properties of Cr(N)-beta-Cr2N nanoparticles prepared by arc-discharge
	W. J. Feng; D. Li; W. F. Li; S. Ma; Y. B. Li; D. K. Xiong; W. S. Zhang; Z. D. Zhang
	2006
发表期刊	Journal of Alloys and Compounds
ISSN	0925-8388
卷号	425 期号:1-2 页码:41008
摘要	Cr(N)-beta-Cr2N nanoparticles were prepared by arc-discharge process in a mixture of argon, hydrogen and nitrogen gases. The nanoparticles are composed of the two components, i,e. Cr(N) solid-solution nanoparticles (polyhedral shape) and beta-Cr2N nitrogen-deficiency nanoparticles (cuboidal shape). Both the nanoparticles share a similar shell-core structure: the shell consists of chromium oxide Cr-2(CrO4)(3) or Cr-O (20 at% Cr), and the complex of Cr and N-O, as well as the core of Cr(N) solid-solution or beta-Cr2N. Moreover, the nanoparticles have a blocking temperature of 29 K and a narrow size distribution. The weak ferromagnetism can be interpreted in terms of the presence of non-compensated surface spins. For the field-cooled (FC) magnetization with the field of 0.01 T, a perfect Curie-Weiss fit of the data above 50 K indicates paramagnetic characteristics of the nanoparticles. This is supported by the hysteresis loops at 5 and 295 K. The paramagnetic Curie temperature of -124 K suggests the type of dominant interaction is antiferromagnetic. (c) 2006 Published by Elsevier B.V.
部门归属	chinese acad sci, inst met res, shenyang natl lab mat sci, int ctr mat phys, shenyang 110016, peoples r china.;feng, wj (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, int ctr mat phys, 72 wenhua rd, shenyang 110016, peoples r china;wjfeng@imr.ac.cn
关键词	Arc-discharge Nanoparticles Blocking Temperature Curie-weiss Law Fe-co(c) Nanocapsules Chromium Temperature Fabrication Particles Oxidation Diborane Nitrides Coatings Metals
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WOS记录号	WOS:000242641500004
引用统计	被引频次：7[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/321006/34196
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	W. J. Feng,D. Li,W. F. Li,et al. Structure and magnetic properties of Cr(N)-beta-Cr2N nanoparticles prepared by arc-discharge[J]. Journal of Alloys and Compounds,2006,425(1-2):41008.
APA	W. J. Feng.,D. Li.,W. F. Li.,S. Ma.,Y. B. Li.,...&Z. D. Zhang.(2006).Structure and magnetic properties of Cr(N)-beta-Cr2N nanoparticles prepared by arc-discharge.Journal of Alloys and Compounds,425(1-2),41008.
MLA	W. J. Feng,et al."Structure and magnetic properties of Cr(N)-beta-Cr2N nanoparticles prepared by arc-discharge".Journal of Alloys and Compounds 425.1-2(2006):41008.