Tuning Magnetic Properties of alpha-MnO(2) Nanotubes by K(+) Doping
文献类型：期刊论文
| 作者 | J. Luo ; H. T. Zhu ; J. K. Liang ; G. H. Rao ; J. B. Li ; Z. M. Du |
| 刊名 | Journal of Physical Chemistry C
 |
| 出版日期 | 2010 |
| 卷号 | 114期号:19页码:8782-8786 |
| ISSN号 | 1932-7447 |
| 关键词 | hydrothermal synthesis manganese-dioxide hollow urchins tunnel phase transitions nanowires growth oxides |
| 中文摘要 | alpha-K(x)MnO(2) nanotubes with x = 0.10, 0.12, 0.15, and 0.17 have been synthesized through acid and alkali treatments of the precursor alpha-MnO(2) 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 Mn(3+) and Mn(4+) 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 Mn(3+)/Mn(4+) 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 Mn(3+) and Mn(4+). Our experiments display that the magnetic properties of alpha-K(x)MnO(2) can be tuned by varying the K(+) content. |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://210.72.142.130/handle/321006/31353]  |
| 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 | J. Luo,H. T. Zhu,J. K. Liang,et al. Tuning Magnetic Properties of alpha-MnO(2) Nanotubes by K(+) Doping[J]. Journal of Physical Chemistry C,2010,114(19):8782-8786. |
| APA | J. Luo,H. T. Zhu,J. K. Liang,G. H. Rao,J. B. Li,&Z. M. Du.(2010).Tuning Magnetic Properties of alpha-MnO(2) Nanotubes by K(+) Doping.Journal of Physical Chemistry C,114(19),8782-8786. |
| MLA | J. Luo,et al."Tuning Magnetic Properties of alpha-MnO(2) Nanotubes by K(+) Doping".Journal of Physical Chemistry C 114.19(2010):8782-8786. |
入库方式： OAI收割
来源：金属研究所
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