The temperature dependence of magnetic properties for cobalt ferrite nanoparticles by the hydrothermal method
文献类型：期刊论文
| 作者 | Y. Zhang ; Y. Liu ; C. L. Fei ; Z. Yang ; Z. H. Lu ; R. Xiong ; D. Yin ; J. Shi |
| 刊名 | Journal of Applied Physics
 |
| 出版日期 | 2010 |
| 卷号 | 108期号:8 |
| 关键词 | surface spin disorder cofe2o4 nanoparticles mn nanoparticles mfe2o4 m size fe nanocomposite nanocrystals particles co |
| ISSN号 | 0021-8979 |
| 中文摘要 | Cobalt ferrite nanoparticles were synthesized via the hydrothermal route with the addition of trisodium citrate dihydrate (Na(3)CA center dot 2H(2)O). The characterizations including x-ray diffraction (XRD) and transmission electron microscope showed that the products of this hydrothermal reaction are composed of cobalt ferrite nanocrystallite and a small amount of FeOOH, and the average crystallite size of the nanoparticles is 7.6 +/- 0.3 nm by XRD. The magnetic measurements revealed the temperature-dependent magnetic properties: The superparamagnetism occurs above 380 K due to the overcoming of energy barrier for the flip of spins, which arises from the magnetocrystalline anisotropy energy and the interparticle interactions due to the aggregation of the nanoparticles; a frozen spin-glasslike state was observed below 20 K, which is accompanied with the decrease in coercivity and high-field paramagnetic susceptibility, as well as the enhancement of saturated magnetization and the effective magnetic anisotropy constant. (C) 2010 American Institute of Physics. [doi:10.1063/1.3499289] |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://210.72.142.130/handle/321006/31731]  |
| 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,Y. Liu,C. L. Fei,et al. The temperature dependence of magnetic properties for cobalt ferrite nanoparticles by the hydrothermal method[J]. Journal of Applied Physics,2010,108(8). |
| APA | Y. Zhang.,Y. Liu.,C. L. Fei.,Z. Yang.,Z. H. Lu.,...&J. Shi.(2010).The temperature dependence of magnetic properties for cobalt ferrite nanoparticles by the hydrothermal method.Journal of Applied Physics,108(8). |
| MLA | Y. Zhang,et al."The temperature dependence of magnetic properties for cobalt ferrite nanoparticles by the hydrothermal method".Journal of Applied Physics 108.8(2010). |
入库方式： OAI收割
来源：金属研究所
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