Ferromagnetism and superparamagnetism of ZnCoO : H nanocrystals

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	Ferromagnetism and superparamagnetism of ZnCoO : H nanocrystals
	Z. H. Wang; D. Y. Geng; S. Guo; W. J. Hu; Z. D. Zhang
	2008
发表期刊	Applied Physics Letters
ISSN	0003-6951
卷号	92 期号:24
摘要	ZnCoO:H nanocrystals are weak ferromagnetic at room temperature with a small coercivity and a small remanence, whereas ZnCoO nanocrystals are paramagnetic. The thermal irreversibility of zero-field cooling and field cooling magnetizations of ZnCoO:H nanocrystals corresponds to the existence of superparamagnetism due to the nanosize effect. X-ray photoelectron spectra show the incorporation of Co(2+) ions inside the ZnO lattice without changing the wurtzite structure. Our data suggest that hydrogen can induce ferromagnetism in ZnCoO and that ferromagnetic ZnCoO:H crystals with small particle size can show the superparamagnetism. (C) 2008 American Institute of Physics.
部门归属	[wang, z. h.] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china. chinese acad sci, int ctr mat phys, shenyang 110016, peoples r china.;wang, zh (reprint author), chinese acad sci, shenyang natl lab mat sci, inst met res, 72 wenhua rd, shenyang 110016, peoples r china;zhwang@imr.ac.cn
关键词	Magnetic Semiconductors Zno Hydrogen Cobalt
URL	查看原文
WOS记录号	WOS:000256934900066
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/321006/33170
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Z. H. Wang,D. Y. Geng,S. Guo,et al. Ferromagnetism and superparamagnetism of ZnCoO : H nanocrystals[J]. Applied Physics Letters,2008,92(24).
APA	Z. H. Wang,D. Y. Geng,S. Guo,W. J. Hu,&Z. D. Zhang.(2008).Ferromagnetism and superparamagnetism of ZnCoO : H nanocrystals.Applied Physics Letters,92(24).
MLA	Z. H. Wang,et al."Ferromagnetism and superparamagnetism of ZnCoO : H nanocrystals".Applied Physics Letters 92.24(2008).