Dynamic properties of spin cluster glass and the exchange bias effect in BiFeO(3) nanocrystals
文献类型：期刊论文
| 作者 | S. N. Dong ; Y. P. Yao ; Y. Hou ; Y. K. Liu ; Y. Tang ; X. G. Li |
| 刊名 | Nanotechnology
 |
| 出版日期 | 2011 |
| 卷号 | 22期号:38 |
| 关键词 | random-field model multiferroic bifeo3 magnetic-properties thin-films bismuth ferrite temperature anisotropy nanoparticles transition dependence |
| ISSN号 | 0957-4484 |
| 中文摘要 | A spin cluster glass behavior and a complicated exchange bias effect are observed in high quality BiFeO(3) 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 BiFeO(3) nanocrystals will shed light on a possible application for magnetism related nanosized devices. |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://210.72.142.130/handle/321006/30307]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | S. N. Dong,Y. P. Yao,Y. Hou,et al. Dynamic properties of spin cluster glass and the exchange bias effect in BiFeO(3) nanocrystals[J]. Nanotechnology,2011,22(38). |
| APA | S. N. Dong,Y. P. Yao,Y. Hou,Y. K. Liu,Y. Tang,&X. G. Li.(2011).Dynamic properties of spin cluster glass and the exchange bias effect in BiFeO(3) nanocrystals.Nanotechnology,22(38). |
| MLA | S. N. Dong,et al."Dynamic properties of spin cluster glass and the exchange bias effect in BiFeO(3) nanocrystals".Nanotechnology 22.38(2011). |
入库方式： OAI收割
来源：金属研究所
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