| Structural and magnetic properties of Mn nanoparticles prepared by arc-discharge | |
| P. Z. Si; E. Bruck; Z. D. Zhang; O. Tegus; W. S. Zhang; K. H. J. Buschow; J. C. P. Klaasse | |
| 2005 | |
| Source Publication | Materials Research Bulletin
 |
| ISSN | 0025-5408 |
| Volume | 40Issue:1Pages:29-37 |
| Abstract | Mn nanoparticles are prepared by arc discharge technique. MnO, alpha-Mn, beta-Mn, and gamma-Mn are detected by X-ray diffraction, while the presence of Mn3O4 and MnO2 is revealed by X-ray photoelectron spectroscopy. Transmission electron microscopy observations show that most of the Mn nanoparticles have irregular shapes, rough surfaces and a shell/core structure, with sizes ranging from several nanometers to 80 nm. The magnetic properties of the Mn nanoparticles are investigated between 2 and 350 K at magnetic fields up to 5 T. A magnetic transition occurring near 43 K is attributed to the formation of the ferrimagnetic Mn3O4. The coercivity of the Mn nanoparticles, arising mainly from Mn3O4, decreases linearly with increasing temperature below 40 K. Below the blocking temperature T-B approximate to 34 K, the hysteresis loops exhibit large coercivity (up to 500 kA/m), owing to finite size effects, and irreversibility in the loops is found up to 4 T, and magnetization is not saturated up to 5 T. The relationship between structure and the magnetic properties are discussed. (C) 2004 Elsevier Ltd. All rights reserved. |
| description.department | chinese acad sci, int ctr mat phys, met res inst, shenyang natl lab mat sci, shenyang 110016, peoples r china. univ amsterdam, van der waals zeeman inst, nl-1018 xe amsterdam, netherlands.;si, pz (reprint author), chinese acad sci, int ctr mat phys, met res inst, shenyang natl lab mat sci, shenyang 110016, peoples r china;psi@science.uva.nl |
| Keyword | Magnetic Materials Nanostructures X-ray Diffraction Magnetic Properties Gamma-fe2o3 Nanoparticles Nanocapsules Manganese Transition Particles Clusters Methane Lattice Mn3o4 |
| URL | 查看原文 |
| WOS ID | WOS:000226258300004 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/35031 |
| Collection | 中国科学院金属研究所 |
| Recommended Citation GB/T 7714 | P. Z. Si,E. Bruck,Z. D. Zhang,et al. Structural and magnetic properties of Mn nanoparticles prepared by arc-discharge[J]. Materials Research Bulletin,2005,40(1):29-37. |
| APA | P. Z. Si.,E. Bruck.,Z. D. Zhang.,O. Tegus.,W. S. Zhang.,...&J. C. P. Klaasse.(2005).Structural and magnetic properties of Mn nanoparticles prepared by arc-discharge.Materials Research Bulletin,40(1),29-37. |
| MLA | P. Z. Si,et al."Structural and magnetic properties of Mn nanoparticles prepared by arc-discharge".Materials Research Bulletin 40.1(2005):29-37. |
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