Tuning Magnetic Properties of alpha-MnO2 Nanotubes by K+ Doping
文献类型：期刊论文
| 作者 | Luo, J ; Zhu, HT ; Liang, JK ; Rao, GH ; Li, JB ; Du, ZM |
| 刊名 | JOURNAL OF PHYSICAL CHEMISTRY C
 |
| 出版日期 | 2010 |
| 卷号 | 114期号:19页码:8782 |
| 关键词 | HYDROTHERMAL SYNTHESIS MANGANESE-DIOXIDE HOLLOW URCHINS TUNNEL PHASE TRANSITIONS NANOWIRES GROWTH OXIDES |
| ISSN号 | 1932-7447 |
| 通讯作者 | Luo, J (reprint author), Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China. |
| 中文摘要 | alpha-KxMnO2 nanotubes with x = 0.10, 0.12, 0.15, and 0.17 have been synthesized through acid and alkali treatments of the precursor alpha-MnO2 nanotubes. For the samples with x = 0.10 and 0.12, a large divergence of the ZFC and FC susceptibilities and pronounced hysteresis at low temperature are observed. However, the samples with x = 0.15 and 0.17 are antiferromagnetic with Neel temperatures of 25.4 and 25.3 K, respectively. The reciprocal susceptibility and electrical conductivity indicate that the samples with x = 0.15 and 0.17 undergo a charge separation transition from mixed/averaged valence state manganese ions to Mn3+ and Mn4+ between 250 and 300 K. Below half occupancy of the K+ site (x <= 0.125), the strong geometrical frustration due to the triangular lattice configuration and the mixture of Mn3+/Mn4+ result in the spin-glass behavior of the samples with x = 0.10 and 0.12. Above half occupancy of the K+ site, the samples with x = 0.15 and 0.17 exhibit an antiferromagnetic feature due to the charge separation of Mn3+ and Mn4+. Our experiments display that the magnetic properties of alpha-KxMnO2 can be tuned by varying the K+ content. |
| 收录类别 | SCI |
| 资助信息 | National Natural Science Foundation of China [20851001]; National Basic Research Program of China [2007CB925003]; Chinese Academy of Sciences |
| 语种 | 英语 |
| 公开日期 | 2013-09-23 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/46189]  |
| 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 | Luo, J,Zhu, HT,Liang, JK,et al. Tuning Magnetic Properties of alpha-MnO2 Nanotubes by K+ Doping[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2010,114(19):8782. |
| APA | Luo, J,Zhu, HT,Liang, JK,Rao, GH,Li, JB,&Du, ZM.(2010).Tuning Magnetic Properties of alpha-MnO2 Nanotubes by K+ Doping.JOURNAL OF PHYSICAL CHEMISTRY C,114(19),8782. |
| MLA | Luo, J,et al."Tuning Magnetic Properties of alpha-MnO2 Nanotubes by K+ Doping".JOURNAL OF PHYSICAL CHEMISTRY C 114.19(2010):8782. |
入库方式： OAI收割
来源：物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。