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Dynamic properties of spin cluster glass and the exchange bias effect in BiFeO3 nanocrystals
Dong, Sining1; Yao, Yiping1; Hou, Ying1; Liu, Yukuai1; Tang, Yang1; Li, Xiaoguang1,2
Corresponding AuthorLi, Xiaoguang(lixg@ustc.edu.cn)
2011-09-23
Source PublicationNANOTECHNOLOGY
ISSN0957-4484
Volume22Issue:38Pages:8
AbstractA 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.
Funding OrganizationNational Natural Science Foundation of China ; National Basic Research Program of China
DOI10.1088/0957-4484/22/38/385701
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China ; National Basic Research Program of China[2011CBA00102] ; National Basic Research Program of China[2009CB929502]
WOS Research AreaScience & Technology - Other Topics ; Materials Science ; Physics
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
WOS IDWOS:000294722400008
PublisherIOP PUBLISHING LTD
Citation statistics
Cited Times:57[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/105367
Collection中国科学院金属研究所
Corresponding AuthorLi, Xiaoguang
Affiliation1.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
Recommended Citation
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.
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