Spin canting and spin-flop transition in antiferromagnetic Cr2O3 nanocrystals

doi:10.1063/1.3213100

IMR OpenIR

	Spin canting and spin-flop transition in antiferromagnetic Cr2O3 nanocrystals
	Li, D.1,2; Han, Z.1,2; Zheng, J. G.3; Wang, X. L.1,2; Geng, D. Y.1,2; Li, J.1,2; Zhang, Z. D.1,2
通讯作者	Li, D.(dali@imr.ac.cn)
	2009-09-01
发表期刊	JOURNAL OF APPLIED PHYSICS
ISSN	0021-8979
卷号	106 期号:5 页码:5
摘要	The structure and magnetic properties of Cr2O3 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 Cr2O3 nanoparticles with spherical morphology. The temperature dependence of the magnetization indicates that these Cr2O3 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.
关键词	antiferromagnetic materials chromium chromium compounds magnetic annealing magnetic structure magnetic transitions magnetisation nanostructured materials Neel temperature
资助者	National Natural Science Foundation of China
DOI	10.1063/1.3213100
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[50831006] ; National Natural Science Foundation of China[50331030] ; National Natural Science Foundation of China[50701045]
WOS研究方向	Physics
WOS类目	Physics, Applied
WOS记录号	WOS:000269850300082
出版者	AMER INST PHYSICS
引用统计	被引频次：34[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/321006/97733
专题	中国科学院金属研究所
通讯作者	Li, D.
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Int Ctr Mat Phys, Shenyang 110016, Peoples R China 3.Univ Calif Irvine, Calif Inst Telecommun & Informat Technol, Ctr Mat Characterizat, LEXI, Irvine, CA 92697 USA
推荐引用方式 GB/T 7714	Li, D.,Han, Z.,Zheng, J. G.,et al. Spin canting and spin-flop transition in antiferromagnetic Cr2O3 nanocrystals[J]. JOURNAL OF APPLIED PHYSICS,2009,106(5):5.
APA	Li, D..,Han, Z..,Zheng, J. G..,Wang, X. L..,Geng, D. Y..,...&Zhang, Z. D..(2009).Spin canting and spin-flop transition in antiferromagnetic Cr2O3 nanocrystals.JOURNAL OF APPLIED PHYSICS,106(5),5.
MLA	Li, D.,et al."Spin canting and spin-flop transition in antiferromagnetic Cr2O3 nanocrystals".JOURNAL OF APPLIED PHYSICS 106.5(2009):5.