Structure and magnetic properties of Cr nanoparticles and Cr2O3 nanoparticles
文献类型：期刊论文
| 作者 | W. S. Zhang ; E. Bruck ; Z. D. Zhang ; O. Tegus ; W. F. Li ; P. Z. Si ; D. Y. Geng ; K. H. J. Buschow |
| 刊名 | Physica B-Condensed Matter
 |
| 出版日期 | 2005 |
| 卷号 | 358期号:1-4页码:332-338 |
| 关键词 | arc-discharge Cr nanoparticles weak ferromagnetism exchange bias nio nanoparticles chromium antiferromagnetism diffraction oxidation anomalies ferritin oxide |
| ISSN号 | 0921-4526 |
| 中文摘要 | We have synthesized Cr nanoparticles by are-discharge and Cr2O3 nanoparticles by subsequent annealing the as-prepared Cr nanoparticles. The structure of these nanoparticles is studied by means of X-ray diffraction, X-ray photoelectron spectroscopy, and high-resolution transmission electron microscope. Most of the particles show a good crystal habit of well-defined cubic or orthorhombic shape, while some small particles show spherical shape. The as-prepared Cr nanoparticles have a BCC Cr core coated with a thin Cr2O3 layer. Cr in the core of the particles heated at 873 K for 4 h is changed to Cr2O3. The results of magnetic measurements show that the Cr nanoparticles exhibit mainly antiferromagnetic properties, in addition to a weak-ferromagnetic component at lower fields. The weak-ferromagnetic component may be ascribed to uncompensated surface spins. For the field-cooled Cr2O3 nanoparticles, an exchange bias is observed in the hysteresis loops, which can be interpreted as the exchange coupling between the uncompensated spins at the surface and the spins in the core of the Cr2O3 nanoparticles. (c) 2005 Elsevier B.V. All rights reserved. |
| 原文出处 | |
| 公开日期 | 2012-04-14 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/35231]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | W. S. Zhang,E. Bruck,Z. D. Zhang,et al. Structure and magnetic properties of Cr nanoparticles and Cr2O3 nanoparticles[J]. Physica B-Condensed Matter,2005,358(1-4):332-338. |
| APA | W. S. Zhang.,E. Bruck.,Z. D. Zhang.,O. Tegus.,W. F. Li.,...&K. H. J. Buschow.(2005).Structure and magnetic properties of Cr nanoparticles and Cr2O3 nanoparticles.Physica B-Condensed Matter,358(1-4),332-338. |
| MLA | W. S. Zhang,et al."Structure and magnetic properties of Cr nanoparticles and Cr2O3 nanoparticles".Physica B-Condensed Matter 358.1-4(2005):332-338. |
入库方式： OAI收割
来源：金属研究所
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