Dynamic properties of spin cluster glass and the exchange bias effect in BiFeO3 nanocrystals

doi:10.1088/0957-4484/22/38/385701

IMR OpenIR

	Dynamic properties of spin cluster glass and the exchange bias effect in BiFeO3 nanocrystals
	Dong, Sining 1; Yao, Yiping 1; Hou, Ying 1; Liu, Yukuai 1; Tang, Yang 1; Li, Xiaoguang 1,2
通讯作者	Li, Xiaoguang(lixg@ustc.edu.cn)
	2011-09-23
发表期刊	NANOTECHNOLOGY
ISSN	0957-4484
卷号	22 期号:38 页码:8
摘要	A spin cluster glass behavior and a complicated exchange bias effect are observed in high quality BiFeO3 nanocrystals grown by a hydrothermal method. The dynamic properties of the spin clusters investigated by measuring the frequency dependences of ac susceptibility show that the relaxation process can be described using a power law with the glass transition temperature T-g = 57 K, relaxation time constant tau(0) = 4.4 x 10(-10) s, and critical exponent zv = 10.3 +/- 1.9, consistent with a three-dimensional Ising spin glass. The exchange bias field (H-EB) varies non-monotonically with temperature and achieves a minimum at T-g. The abnormal shift of hysteresis loops above T-g may be interpreted in terms of a Malozemoff's random-field model with a framework of antiferromagnetic core/spin-cluster shell structure and a two-dimensional diluted antiferromagnet in a field (2D-DAFF) model, respectively. The exchange anisotropy of the BiFeO3 nanocrystals will shed light on a possible application for magnetism related nanosized devices.
资助者	National Natural Science Foundation of China ; National Basic Research Program of China
DOI	10.1088/0957-4484/22/38/385701
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China ; National Basic Research Program of China[2011CBA00102] ; National Basic Research Program of China[2009CB929502]
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Physics
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
WOS记录号	WOS:000294722400008
出版者	IOP PUBLISHING LTD
引用统计	被引频次：63[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/321006/105367
专题	中国科学院金属研究所
通讯作者	Li, Xiaoguang
作者单位	1.Univ Sci & Technol China, Dept Phys, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Peoples R China 2.Acad Sinica, Int Ctr Mat Phys, Shenyang 110015, Peoples R China
推荐引用方式 GB/T 7714	Dong, Sining,Yao, Yiping,Hou, Ying,et al. Dynamic properties of spin cluster glass and the exchange bias effect in BiFeO3 nanocrystals[J]. NANOTECHNOLOGY,2011,22(38):8.
APA	Dong, Sining,Yao, Yiping,Hou, Ying,Liu, Yukuai,Tang, Yang,&Li, Xiaoguang.(2011).Dynamic properties of spin cluster glass and the exchange bias effect in BiFeO3 nanocrystals.NANOTECHNOLOGY,22(38),8.
MLA	Dong, Sining,et al."Dynamic properties of spin cluster glass and the exchange bias effect in BiFeO3 nanocrystals".NANOTECHNOLOGY 22.38(2011):8.