Composition and magnetic properties of cobalt ferrite nano-particles prepared by the co-precipitation method
文献类型：期刊论文
| 作者 | Y. Zhang ; Z. Yang ; D. Yin ; Y. Liu ; C. L. Fei ; R. Xiong ; J. Shi ; G. L. Yan |
| 刊名 | Journal of Magnetism and Magnetic Materials
 |
| 出版日期 | 2010 |
| 卷号 | 322期号:21页码:3470-3475 |
| 关键词 | Cobalt ferrite nano-particles Co-precipitation Composition Magnetic properties cofe2o4 nanoparticles hydrothermal synthesis room-temperature nanocrystals raman size |
| ISSN号 | 0304-8853 |
| 中文摘要 | Cobalt ferrite nano-particles were prepared using the co-precipitation method followed by annealing treatment. The formation of nano-particles with different composition, microstructure and sizes were confirmed by X-ray diffraction, Raman, thermogravimetric-differential thermal analysis and transmission electron microscope. The magnetic hysteresis loops measured at room temperature revealed smaller effective magnetic anisotropy constant, coercivity and remanence ratio for the samples prepared by adding the NaOH solutions into the mixed solutions of Co(2+) and Fe(3+) ions due to the formation of Co(3+) ions. A small saturation magnetization and an enhanced coercivity were observed for the nano-particles prepared by adding the mixed solutions of Co(2+) and Fe(3+) ions into the NaOH solutions, which was related to the formation of outer layers with poor crystallization on the surfaces of the cobalt ferrite nano-crystals. Furthermore, the existence of these outer layers induced the oxidation of Co(2+) ions in cobalt ferrite nano-crystals at 200 and 300 degrees C, and led to a large change on the composition and magnetic properties. (C) 2010 Elsevier B.V. All rights reserved. |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://210.72.142.130/handle/321006/31732]  |
| 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 | Y. Zhang,Z. Yang,D. Yin,et al. Composition and magnetic properties of cobalt ferrite nano-particles prepared by the co-precipitation method[J]. Journal of Magnetism and Magnetic Materials,2010,322(21):3470-3475. |
| APA | Y. Zhang.,Z. Yang.,D. Yin.,Y. Liu.,C. L. Fei.,...&G. L. Yan.(2010).Composition and magnetic properties of cobalt ferrite nano-particles prepared by the co-precipitation method.Journal of Magnetism and Magnetic Materials,322(21),3470-3475. |
| MLA | Y. Zhang,et al."Composition and magnetic properties of cobalt ferrite nano-particles prepared by the co-precipitation method".Journal of Magnetism and Magnetic Materials 322.21(2010):3470-3475. |
入库方式： OAI收割
来源：金属研究所
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