Size-dependent exchange bias in La0.25Ca0.75MnO3 nanoparticles
文献类型：期刊论文
| 作者 | Huang, X. H.1; Ding, J. F.; Zhang, G. Q.; Hou, Y.; Yao, Y. P.; Li, X. G. |
| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2008-12-01 |
| 卷号 | 78期号:22页码:5 |
| 关键词 | calcium compounds coercive force exchange interactions (electron) lanthanum compounds magnetic cooling magnetic hysteresis magnetic particles nanoparticles particle size |
| ISSN号 | 1098-0121 |
| DOI | 10.1103/PhysRevB.78.224408 |
| 通讯作者 | Huang, X. H.() |
| 英文摘要 | Exchange bias phenomena are observed in La0.25Ca0.75MnO3 nanoparticles with average sizes ranging from 40 to 1000 nm. It is found that the magnetic hysteresis loops display horizontal and vertical shifts in field-cooled processes. The variations of the exchange bias field (H-EB) and the coercivity (H-c) with particle size follow nonmonotonic dependencies and show maxima for particles with diameter around 80 nm at T=5 K, which can be mainly ascribed to the changes in uncompensated surface spins with nanoparticle size. The peak position for H-c shifts to larger particle size at higher temperature while that for H-EB is unconspicuous. The linear relationship between H-EB and vertical magnetization shift (M-EB) further indicates that the characteristics of uncompensated spins play an important role in the variations of H-EB for the manganite. |
| 资助项目 | National Natural Science Foundation of China[50721061] ; National Natural Science Foundation of China[50832007] ; National Basic Research Program of China[2006CB922005] ; National Basic Research Program of China[2009CB929502] |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000262245200055 |
| 出版者 | AMER PHYSICAL SOC |
| 资助机构 | National Natural Science Foundation of China ; National Basic Research Program of China |
| 源URL | [http://ir.imr.ac.cn/handle/321006/94471]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Huang, X. H. |
| 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 | Huang, X. H.,Ding, J. F.,Zhang, G. Q.,et al. Size-dependent exchange bias in La0.25Ca0.75MnO3 nanoparticles[J]. PHYSICAL REVIEW B,2008,78(22):5. |
| APA | Huang, X. H.,Ding, J. F.,Zhang, G. Q.,Hou, Y.,Yao, Y. P.,&Li, X. G..(2008).Size-dependent exchange bias in La0.25Ca0.75MnO3 nanoparticles.PHYSICAL REVIEW B,78(22),5. |
| MLA | Huang, X. H.,et al."Size-dependent exchange bias in La0.25Ca0.75MnO3 nanoparticles".PHYSICAL REVIEW B 78.22(2008):5. |
入库方式： OAI收割
来源：金属研究所
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