Magnetic properties of Dy nanoparticles and Al2O3-coated Dy nanocapsules
文献类型：期刊论文
| 作者 | Liu, X. G.1,2,3,4; Or, S. W.3; Li, B.1,2; Ou, Z. Q.4; Zhang, L.4; Zhang, Q.1,2; Geng, D. Y.1,2; Yang, F.1,2; Li, D.1,2; Bruck, E.4 |
| 刊名 | JOURNAL OF NANOPARTICLE RESEARCH
 |
| 出版日期 | 2011-03-01 |
| 卷号 | 13期号:3页码:1163-1174 |
| 关键词 | Nanoparticles Magnetic properties Size effect Rare-earth metals |
| ISSN号 | 1388-0764 |
| DOI | 10.1007/s11051-010-0108-y |
| 通讯作者 | Liu, X. G.(liuxianguohugh@gmail.com) |
| 英文摘要 | Dy2O3-coated Dy nanoparticles and Al2O3-coated Dy nanocapsules, with Dy cores with the average size of 3.6 and 17.6 nm, respectively, are synthesized by arc-discharge technique. The transition from ferromagnetism to antiferromagnetism absents in the Dy nanoparticles, due to that its average core size of 3.6 nm is smaller than the helix period of Dy. The temperature of the superparamagnetism-antiferromagnetism transition in the Dy nanocapsules increases abnormally to 105 K, while the N,el temperature decreases to 150 K. The magnetic-entropy change (-a dagger S (m)) of the Dy nanoparticles rapidly increases with decreasing temperature. For Al2O3-coated Dy nanocapsules, -a dagger S (m) reaches 15.2 J kg(-1) K-1 at 7.5 K, due to the existence of superparamagnetism, and a peak (5.2 J kg(-1) K-1) appears at 105 K due to the superparamgantism-antiferromagnetism transition, and -a dagger S (m) exceeds 2 J kg(-1) K-1 in the temperature range from 7.5 to 105 K, for a field change from 1 to 5 T. |
| 资助项目 | Science Exchange Program ; Ministry of Science and Technology of China[2010CB934603] ; National Natural Science Foundation of China[50701045] ; Hong Kong Polytechnic University[G-YX3 V] |
| WOS研究方向 | Chemistry ; Science & Technology - Other Topics ; Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000289003000025 |
| 出版者 | SPRINGER |
| 资助机构 | Science Exchange Program ; Ministry of Science and Technology of China ; National Natural Science Foundation of China ; Hong Kong Polytechnic University |
| 源URL | [http://ir.imr.ac.cn/handle/321006/106788]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Liu, X. G. |
| 作者单位 | 1.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Int Ctr Mat Phys, Shenyang 110016, Peoples R China 3.Hong Kong Polytech Univ, Dept Elect Engn, Kowloon, Hong Kong, Peoples R China 4.Delft Univ Technol, Fundamental Aspects Mat & Energy Grp, Fac Sci Appl, NL-2629 JB Delft, Netherlands |
| 推荐引用方式 GB/T 7714 | Liu, X. G.,Or, S. W.,Li, B.,et al. Magnetic properties of Dy nanoparticles and Al2O3-coated Dy nanocapsules[J]. JOURNAL OF NANOPARTICLE RESEARCH,2011,13(3):1163-1174. |
| APA | Liu, X. G..,Or, S. W..,Li, B..,Ou, Z. Q..,Zhang, L..,...&Zhang, Z. D..(2011).Magnetic properties of Dy nanoparticles and Al2O3-coated Dy nanocapsules.JOURNAL OF NANOPARTICLE RESEARCH,13(3),1163-1174. |
| MLA | Liu, X. G.,et al."Magnetic properties of Dy nanoparticles and Al2O3-coated Dy nanocapsules".JOURNAL OF NANOPARTICLE RESEARCH 13.3(2011):1163-1174. |
入库方式： OAI收割
来源：金属研究所
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