您的位置：首页 > 论文页面
钴、碳共掺杂铌酸锂的局域结构与磁性
发表时间：2012-05-15 浏览量：1357 下载量：584
| 全部作者： | 盛蓬，曾飞，陈超，潘峰 |
| 作者单位： | 清华大学材料科学与工程系先进材料教育部重点实验室 |
| 摘 要： | 采用高能离子多能量注入的方法制备了Co原子浓度为3.5%，C原子浓度分别为2%，3%，4%的Co，C共掺杂LiNbO3薄膜，研究了掺杂浓度和退火工艺对LiNbO3局域结构和磁性的影响。Co的K边X射线近邻吸收谱(X-ray absorption near edge structure, XANES)证明：对低的C掺杂浓度样品，Co取代了Nb的位置；当C浓度较高时，有金属Co析出。磁性分析结果表明：随着C浓度的增加，LiNbO3样品的磁性得到增强。此外，C掺杂导致结构缺陷的增加被认为是掺杂LiNbO3磁性增强的起因。 |
| 关 键 词： | 材料物理；LiNbO3；稀磁氧化物；X射线近邻结构 |
| Title： | Microstructure and magnetic properties of Co and C co-doped LiNbO3 |
| Author： | SHENG Peng, ZENG Fei, CHEN Chao, PAN Feng |
| Organization： | Key Laboratory for Advanced Materials of Ministry of Education, Department of Materials Science and Engineering, Tsinghua University |
| Abstract： | In this paper, Co and C co-doped LiNbO3 was prepared by ion beam implantation with Co atom content of 3.5% and C atom contents of 2%, 3%, 4%, respectively. The microstructure and magnetic properties of the doped LiNbO3 were investigated. With low concentration of C, structure characterization using X-ray absorption near edge structure (XANES) determined that the Co atoms substituted principally the Nb atoms in the LiNbO3 lattice. When the atom concentration of C achieved 4%, Co clusters were precipitated from the LiNbO3 lattice. The magnetic properties of the doped LiNbO3 are enhanced as the increase of C contents. The ferromagnetism in (Co, C)-doped LiNbO3 is proposed to be mediated by the structure defects induced by C doping. |
| Key words： | materials physics; LiNbO3; diluted magnetic oxides; X-ray absorption near edge structure |
| 发表期数： | 2012年5月第9期 |
| 引用格式： | 盛蓬，曾飞，陈超，等. 钴、碳共掺杂铌酸锂的局域结构与磁性[J]. 中国科技论文在线精品论文，2012，5（9）：814-819. |
0
评论数 0请您登录
暂无评论
下载全文
多维论文