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Magnetic properties of Dy nanoparticles and Al2O3-coated Dy nanocapsules
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; Zhang, Z. D.1,2
Corresponding AuthorLiu, X. G.(liuxianguohugh@gmail.com)
2011-03-01
Source PublicationJOURNAL OF NANOPARTICLE RESEARCH
ISSN1388-0764
Volume13Issue:3Pages:1163-1174
AbstractDy2O3-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.
KeywordNanoparticles Magnetic properties Size effect Rare-earth metals
Funding OrganizationScience Exchange Program ; Ministry of Science and Technology of China ; National Natural Science Foundation of China ; Hong Kong Polytechnic University
DOI10.1007/s11051-010-0108-y
Indexed BySCI
Language英语
Funding ProjectScience 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 Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science
WOS SubjectChemistry, Multidisciplinary ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS IDWOS:000289003000025
PublisherSPRINGER
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/106789
Collection中国科学院金属研究所
Corresponding AuthorLiu, X. G.
Affiliation1.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
Recommended Citation
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.
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