Spin canting and spin-flop transition in antiferromagnetic Cr(2)O(3) nanocrystals

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	Spin canting and spin-flop transition in antiferromagnetic Cr(2)O(3) nanocrystals
	D. Li; Z. Han; J. G. Zheng; X. L. Wang; D. Y. Geng; J. Li; Z. D. Zhang
	2009
发表期刊	Journal of Applied Physics
ISSN	0021-8979
卷号	106 期号:5
摘要	The structure and magnetic properties of Cr(2)O(3) and Cr nanoparticles have been investigated. The as-prepared Cr nanoparticles show a core/shell structure, consisting of a Cr core and a thin Cr oxide shell with a thickness of 1.5-2.5 nm. Annealing the Cr nanoparticles in air leads to the formation of Cr(2)O(3) nanoparticles with spherical morphology. The temperature dependence of the magnetization indicates that these Cr(2)O(3) nanocrystals are antiferromagnetic below their Neacuteel temperature of 320 K and undergo an antiferromagnetic to weak-ferromagnetic transition below about 140 K due to spin canting at disordered surfaces. Below 100 K, a spin-flop transition is induced by an external field with a critical field lower than about 7 T.
部门归属	[li, d.; han, z.; wang, x. l.; geng, d. y.; li, j.; zhang, z. d.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [li, d.; han, z.; wang, x. l.; geng, d. y.; li, j.; zhang, z. d.] chinese acad sci, int ctr mat phys, shenyang 110016, peoples r china. [zheng, j. g.] univ calif irvine, calif inst telecommun & informat technol, ctr mat characterizat, lexi, irvine, ca 92697 usa.;li, d (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, wenhua rd 72, shenyang 110016, peoples r china;dali@imr.ac.cn
关键词	Antiferromagnetic Materials Chromium Chromium Compounds Magnetic Annealing Magnetic Structure Magnetic Transitions Magnetisation Nanostructured Materials Neel Temperature Magnetic-properties Nio Nanoparticles Fine Particles Ferritin Systems
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/32015
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	D. Li,Z. Han,J. G. Zheng,et al. Spin canting and spin-flop transition in antiferromagnetic Cr(2)O(3) nanocrystals[J]. Journal of Applied Physics,2009,106(5).
APA	D. Li.,Z. Han.,J. G. Zheng.,X. L. Wang.,D. Y. Geng.,...&Z. D. Zhang.(2009).Spin canting and spin-flop transition in antiferromagnetic Cr(2)O(3) nanocrystals.Journal of Applied Physics,106(5).
MLA	D. Li,et al."Spin canting and spin-flop transition in antiferromagnetic Cr(2)O(3) nanocrystals".Journal of Applied Physics 106.5(2009).