| Unconventional exchange bias in CoCr2O4/Cr2O3 nanocomposites | |
| Guo, S.; Liu, X. H.; Cui, W. B.; Liu, W.1; Zhao, X. G.; Li, D.; Zhang, Z. D. | |
| Corresponding Author | Liu, W.(wliu@imr.ac.cn) |
| 2009-03-15 | |
| Source Publication | JOURNAL OF APPLIED PHYSICS
 |
| ISSN | 0021-8979 |
| Volume | 105Issue:6Pages:3 |
| Abstract | 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. |
| Keyword | 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 |
| Funding Organization | National Natural Science Foundation of China |
| DOI | 10.1063/1.3100036 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Natural Science Foundation of China[50831006] ; National Natural Science Foundation of China[50331030] ; National Natural Science Foundation of China[50571098] |
| WOS Research Area | Physics |
| WOS Subject | Physics, Applied |
| WOS ID | WOS:000264774000181 |
| Publisher | AMER INST PHYSICS |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/97803 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Liu, W. |
| Affiliation | 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 |
| Recommended Citation 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. |
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