Dynamic properties of spin cluster glass and the exchange bias effect in BiFeO3 nanocrystals
文献类型：期刊论文
| 作者 | Dong, Sining1; Yao, Yiping1; Hou, Ying1; Liu, Yukuai1; Tang, Yang1; Li, Xiaoguang1,2 |
| 刊名 | NANOTECHNOLOGY
 |
| 出版日期 | 2011-09-23 |
| 卷号 | 22期号:38页码:8 |
| ISSN号 | 0957-4484 |
| DOI | 10.1088/0957-4484/22/38/385701 |
| 通讯作者 | Li, Xiaoguang(lixg@ustc.edu.cn) |
| 英文摘要 | 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 |
| 语种 | 英语 |
| WOS记录号 | WOS:000294722400008 |
| 出版者 | IOP PUBLISHING LTD |
| 资助机构 | National Natural Science Foundation of China ; National Basic Research Program of China |
| 源URL | [http://ir.imr.ac.cn/handle/321006/105366]  |
| 专题 | 金属研究所_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. |
入库方式： OAI收割
来源：金属研究所
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