| Co掺杂CaO材料的铁磁性研究 |
| |
| 引用本文： | 赵婧,李晋闽,夏庆林. Co掺杂CaO材料的铁磁性研究[J]. 西安交通大学学报, 2011, 45(11): 112-115 |
| |
| 作者姓名： | 赵婧 李晋闽 夏庆林 |
| |
| 作者单位： | 1. 中国科学院半导体研究所半导体照明研发中心,100083,北京
2. 中南大学粉末冶金国家重点实验室,410083,长沙 |
| |
| 基金项目： | 国家高技术研究发展计划资助项目 |
| |
| 摘 要： | 利用固态反应法制备了具有铁磁性的Co掺杂CaO纳米粉末材料,并对材料的结构和磁学性质进行了研究.X射线衍射和高分辨率透射电镜测试结果表明,材料为单相的CaO立方结构,Co掺杂导致了晶格常数的减小,表明Co离子通过替位Ca离子融入了CaO晶格.磁性分析表明,该Co掺杂CaO纳米粉末表现出了明显的铁磁特性,临界温度高于70K.通过分析认为,材料的铁磁性是由浅施主缺陷O空位与Co离子耦合形成束缚磁极化子引起的.
|
| 关 键 词： | 稀磁材料 纳米粒子 铁磁性 固相反应法 |
Ferromagnetism in Co-Doped CaO Nanopowder |
| |
| ZHAO Jing,LI Jinmin,XIA Qinglin. Ferromagnetism in Co-Doped CaO Nanopowder[J]. Journal of Xi'an Jiaotong University, 2011, 45(11): 112-115 |
| |
| Authors: | ZHAO Jing LI Jinmin XIA Qinglin |
| |
| Affiliation: | ZHAO Jing1,LI Jinmin1,XIA Qinglin2(1.Semiconductor Lighting Research and Development Center,Institute of Semiconductors,Chinese Academy of Sciences,Beijing 100083,China,2.State Key Laboratory for Powder Metallurgy,Central South University,Changsha 410083,China) |
| |
| Abstract: | The Co-doped CaO nanopowder was prepared by solid-state synthesis method.The structural and magnetic properties were investigated.X-ray diffraction and high resolution transmission electron microscopy studies show single-phase cubic CaO and distinct contraction of the lattice with Co doping,indicating an actual incorporation of Co ions into the CaO lattice.The magnetic studies show that the Co-doped CaO nanopowder displays a clear ferromagnetism behavior with the critical temperature higher than 70 K.The an... |
| |
| Keywords: | magnetic material nanoparticle ferromagnetism solid-state method |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
