| 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 Author | Li, Xiaoguang(lixg@ustc.edu.cn) |
| 2011-09-23 | |
| Source Publication | NANOTECHNOLOGY
 |
| ISSN | 0957-4484 |
| Volume | 22Issue:38Pages:8 |
| Abstract | 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. |
| Funding Organization | National Natural Science Foundation of China ; National Basic Research Program of China |
| DOI | 10.1088/0957-4484/22/38/385701 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Natural Science Foundation of China ; National Basic Research Program of China[2011CBA00102] ; National Basic Research Program of China[2009CB929502] |
| WOS Research Area | Science & Technology - Other Topics ; Materials Science ; Physics |
| WOS Subject | Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied |
| WOS ID | WOS:000294722400008 |
| Publisher | IOP PUBLISHING LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/105367 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Li, Xiaoguang |
| Affiliation | 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 |
| 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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