Magnetic properties of Ba4Co2Fe36O60 nanocrystals prepared through a sol-gel method
文献类型：期刊论文
| 作者 | Xiong, G ; Xu, M ; Mai, ZH |
| 刊名 | SOLID STATE COMMUNICATIONS
 |
| 出版日期 | 2001 |
| 卷号 | 118期号:1页码:53 |
| 关键词 | BARIUM FERRITE HEXAGONAL FERRITES PARTICLES FINE POWDERS CRYSTALLIZATION COPRECIPITATION DYNAMICS SIZE CO |
| ISSN号 | 0038-1098 |
| 通讯作者 | Xiong, G: Chinese Acad Sci, Inst Phys, POB 603, Beijing 100080, Peoples R China. |
| 中文摘要 | Ba4CO2Fe36O60 (Co-2-U) nanocrystals were synthesized through a stearic acid sol-gel method. The reaction temperatures were dramatically lower than those prepared through the conventional ceramic method. The nanocrystalline powders obtained at 750 degreesC were approximately spherical in shape with grain sizes ranging from 10 to 25 nm and became cubic-like when the heat-treatment temperature was increased. The surface composition of the nanocrystalline Ba4Co2Fe36O60 was found to be different from that of the bulk counterpart material, exhibiting a higher content of Ba and Co. The magnetic properties of these samples are clearly size-dependent. The specific saturation magnetization is lower than that of bulk Ba4Co2Fe36O60 and decreases with the grain size D. This phenomenon is explained by assuming the existence of a nonmagnetic layer on the surface of the particles. The coercivity of Ba4Co2Fe36O60 nanocrystals reaches a maximum when the particle sizes are approximately equal to 80 nm and then decreases notably as the particle sizes are further reduced. These results are attributed to the superparamagnetic effects in a random distribution of single domain ferromagnetic particles. (C) 2001 Elsevier Science Ltd. All rights reserved. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2013-09-18 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/41343]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Xiong, G,Xu, M,Mai, ZH. Magnetic properties of Ba4Co2Fe36O60 nanocrystals prepared through a sol-gel method[J]. SOLID STATE COMMUNICATIONS,2001,118(1):53. |
| APA | Xiong, G,Xu, M,&Mai, ZH.(2001).Magnetic properties of Ba4Co2Fe36O60 nanocrystals prepared through a sol-gel method.SOLID STATE COMMUNICATIONS,118(1),53. |
| MLA | Xiong, G,et al."Magnetic properties of Ba4Co2Fe36O60 nanocrystals prepared through a sol-gel method".SOLID STATE COMMUNICATIONS 118.1(2001):53. |
入库方式： OAI收割
来源：物理研究所
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