Structural and magnetic properties of Zn1-xCoxO (0 < x <= 0.30) nanoparticles

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	Structural and magnetic properties of Zn1-xCoxO (0 < x <= 0.30) nanoparticles
	L. B. Duan; W. G. Chu; J. Yu; Y. C. Wang; L. N. Zhang; G. Y. Liu; J. K. Liang; G. H. Rao
	2008
发表期刊	Journal of Magnetism and Magnetic Materials
ISSN	0304-8853
卷号	320 期号:8 页码:1573-1581
摘要	We present a systematic investigation on the structural and magnetic properties of Zn1-xCoxO nanoparticles synthesized by an auto-combustion method. The single-phase Zn1-xCoxO crystallize in the wurtzite-type structure with a homogeneity range as large as x approximate to 0.30, which enables the observation of some anomalies. The lattice parameter a and the unit cell volume V increase with the Co content, and anomalies are discernable around x = 0.15 on the a-x and V-x curves. The magnetization data show no evidence of ferromagnetic ( FM) ordering in our samples down to T 5K, and the magnetization at 5K and 5T exhibits a maximum around x 0.125. Based on the detailed analysis of the magnetization data and the donor impurity band exchange model, the anomalies on composition dependence of both the lattice parameters and magnetization can be associated with an occurrence of cation percolation around the threshold x(p) (approximate to 1.5/Z = 0.125 for three-dimensional lattice with coordination number Z = 12). Within the framework of the donor impurity band exchange model, the absence of FM in the well-characterized Zn1-xCoxO can be attributed to insufficient donor electron concentration. (c) 2008 Elsevier B. V. All rights reserved.
部门归属	[duan, l. b.; yu, j.; wang, y. c.; liu, g. y.; liang, j. k.; rao, g. h.] chinese acad sci, inst phys, beijing natl lab condensed matter phys, beijing 100080, peoples r china. [chu, w. g.] natl ctr nanosci & technol china, beijing 100080, peoples r china. [zhang, l. n.] tsinghua univ, dept phys, beijing 100084, peoples r china. [zhang, l. n.] tsinghua univ, tsinghua foxconn nanotechnol res ctr, beijing 100084, peoples r china. [liang, j. k.] chinese acad sci, int ctr mat phys, shenyang 110016, peoples r china.;rao, gh (reprint author), chinese acad sci, inst phys, beijing natl lab condensed matter phys, pob 603, beijing 100080, peoples r china;ghrao@aphy.iphy.ac.cn
关键词	Diluted Magnetic Semiconductors Crystal Structure Magnetization Cation Percolation Co-doped Zno Temperature Ferromagnetism Semiconductors Exchange Origin Films
URL	查看原文
WOS记录号	WOS:000254420400029
引用统计	被引频次：41[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/321006/32728
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	L. B. Duan,W. G. Chu,J. Yu,et al. Structural and magnetic properties of Zn1-xCoxO (0 < x <= 0.30) nanoparticles[J]. Journal of Magnetism and Magnetic Materials,2008,320(8):1573-1581.
APA	L. B. Duan.,W. G. Chu.,J. Yu.,Y. C. Wang.,L. N. Zhang.,...&G. H. Rao.(2008).Structural and magnetic properties of Zn1-xCoxO (0 < x <= 0.30) nanoparticles.Journal of Magnetism and Magnetic Materials,320(8),1573-1581.
MLA	L. B. Duan,et al."Structural and magnetic properties of Zn1-xCoxO (0 < x <= 0.30) nanoparticles".Journal of Magnetism and Magnetic Materials 320.8(2008):1573-1581.