Unconventional exchange bias in CoCr2O4/Cr2O3 nanocomposites
文献类型：期刊论文
| 作者 | Guo, S.; Liu, X. H.; Cui, W. B.; Liu, W.1; Zhao, X. G.; Li, D.; Zhang, Z. D. |
| 刊名 | JOURNAL OF APPLIED PHYSICS
 |
| 出版日期 | 2009-03-15 |
| 卷号 | 105期号:6页码:3 |
| 关键词 | antiferromagnetic materials chromium compounds cobalt compounds coercive force Curie temperature exchange interactions (electron) ferrimagnetic materials interface magnetism magnetic domains magnetic particles nanocomposites nanoparticles Neel temperature paramagnetic materials Zeeman effect |
| ISSN号 | 0021-8979 |
| DOI | 10.1063/1.3100036 |
| 通讯作者 | Liu, W.(wliu@imr.ac.cn) |
| 英文摘要 | Unconventional exchange bias (EB) has been studied in CoCr2O4/Cr2O3 nanocomposites, in which the Curie temperature of the ferrimagnetic CoCr2O4 is much lower than the Neel temperature of the antiferromagnetic Cr2O3. A negative EB field of about 2.5 kOe at 5 K is achieved upon cooling in a field of 30 kOe. Meanwhile, the coercivity of the CoCr2O4 nanoparticles has been enhanced significantly by coupling with Cr2O3. The effect of the cooling field on the EB field and coercivity at 10 K has also been investigated. The domain-state model is used to interpret the unconventional EB. Cooling field may play a decisive role in the creation of the interfacial spin configuration for the unconventional EB, not only by exchange interaction between the induced magnetization of a polarized paramagnet and interfacial spins of an antiferromagnet but also by Zeeman interaction between the domain-state surplus magnetization and the external field. |
| 资助项目 | National Natural Science Foundation of China[50831006] ; National Natural Science Foundation of China[50331030] ; National Natural Science Foundation of China[50571098] |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000264774000181 |
| 出版者 | AMER INST PHYSICS |
| 资助机构 | National Natural Science Foundation of China |
| 源URL | [http://ir.imr.ac.cn/handle/321006/97802]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Liu, W. |
| 作者单位 | 1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Int Ctr Mat Phys, Shenyang 110016, Peoples R China |
| 推荐引用方式 GB/T 7714 | Guo, S.,Liu, X. H.,Cui, W. B.,et al. Unconventional exchange bias in CoCr2O4/Cr2O3 nanocomposites[J]. JOURNAL OF APPLIED PHYSICS,2009,105(6):3. |
| APA | Guo, S..,Liu, X. H..,Cui, W. B..,Liu, W..,Zhao, X. G..,...&Zhang, Z. D..(2009).Unconventional exchange bias in CoCr2O4/Cr2O3 nanocomposites.JOURNAL OF APPLIED PHYSICS,105(6),3. |
| MLA | Guo, S.,et al."Unconventional exchange bias in CoCr2O4/Cr2O3 nanocomposites".JOURNAL OF APPLIED PHYSICS 105.6(2009):3. |
入库方式： OAI收割
来源：金属研究所
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