Synthesis and magnetic properties of antiferromagnetic Co3O4 nanoparticles

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	Synthesis and magnetic properties of antiferromagnetic Co3O4 nanoparticles
	H. T. Zhu; J. Luo; J. K. Liang; G. H. Rao; J. B. Li; J. Y. Zhang; Z. M. Du
	2008
发表期刊	Physica B-Condensed Matter
ISSN	0921-4526
卷号	403 期号:18 页码:3141-3145
摘要	Anti ferromagnetic Co3O4 nanoparticles with diameter around 30nm have been synthesized by a solution-based method. The phase identification by the wide-angle X-ray powder diffraction indicates that the CO3O4 nanoparticle has a cubic spinel structure with a lattice constant of 0.80843(2) nm. The image of field emission scanning electron microscope shows that the nanoparticles are assembled together to form nanorods. The magnetic properties of Co3O4 fine particles have been measured by a superconducting quantum interference device magnetometer. A deviation of the Neel temperature from the bulk is observed, which can be well described by the theory of finite-size scaling. An enhanced coercivity as well as a loop shift are observed in the field-cooled hysteresis loop. The exchange bias field decreases with increasing temperature and diminishes at the Neel temperature. The training effect and the opening of the loop reveal the existence of the spin-glass-like surface spins. (C) 2008 Elsevier B.V. All rights reserved.
部门归属	[zhu, h. t.; luo, j.; liang, j. k.; rao, g. h.; li, j. b.; zhang, j. y.] chinese acad sci, inst phys, beijing natl lab condensed matter phys, beijing 100190, peoples r china. [zhu, h. t.; du, z. m.] univ sci & technol beijing, dept mat sci & engn, beijing 100083, peoples r china. [liang, j. k.] chinese acad sci, int ctr mat phys, shenyang 110016, peoples r china.;luo, j (reprint author), chinese acad sci, inst phys, beijing natl lab condensed matter phys, beijing 100190, peoples r china;jluo@aphy.iphy.ac.cn
关键词	Nanoparticles Antiferromagnetism Finite Size Effects Curie-temperature Cobalt-hydroxide Decomposition Superlattices Anisotropy Particles
URL	查看原文
WOS记录号	WOS:000259626500031
引用统计	被引频次：70[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/321006/33404
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	H. T. Zhu,J. Luo,J. K. Liang,et al. Synthesis and magnetic properties of antiferromagnetic Co3O4 nanoparticles[J]. Physica B-Condensed Matter,2008,403(18):3141-3145.
APA	H. T. Zhu.,J. Luo.,J. K. Liang.,G. H. Rao.,J. B. Li.,...&Z. M. Du.(2008).Synthesis and magnetic properties of antiferromagnetic Co3O4 nanoparticles.Physica B-Condensed Matter,403(18),3141-3145.
MLA	H. T. Zhu,et al."Synthesis and magnetic properties of antiferromagnetic Co3O4 nanoparticles".Physica B-Condensed Matter 403.18(2008):3141-3145.