| 准一维有机铁磁体中的自旋耦合 |
| |
| 引用本文： | 朱丽娅.准一维有机铁磁体中的自旋耦合[J].佛山科学技术学院学报(自然科学版),2007,25(2):26-28. |
| |
| 作者姓名： | 朱丽娅 |
| |
| 作者单位： | 三峡大学,理学院,湖北,宜昌,443002 |
| |
| 摘 要： | 应用Peierls-Hubbard模型研究了一种结构类似于poly-BIPO的准一维有机铁磁体。采用Hartree-Fock近似和周期性边界条件,探讨了最近邻相互作用和次近邻相互作用对系统的铁磁基态的影响。由于最近邻与次近邻相互作用之间的竞争,导致主链上相邻格点的自旋发生反铁磁耦合→铁磁耦合的变化,形成反铁磁自旋波或铁磁自旋波作为传递媒介,使自由基自旋得以平行排列,得到高自旋的铁磁基态。
|
| 关 键 词： | Peierls-Hubbard模型 有机铁磁体 自旋耦合 |
| 文章编号： | 1008-0171（2007）02-0026-03 |
| 收稿时间： | 2007-01-18 |
| 修稿时间： | 2007-01-18 |
The spin coupling in the quasi-one-dimensional organic ferromagnet |
| |
| ZHU Li-ya.The spin coupling in the quasi-one-dimensional organic ferromagnet[J].Journal of Foshan University(Natural Science Edition),2007,25(2):26-28. |
| |
| Authors: | ZHU Li-ya |
| |
| Institution: | College of Science, Three Gorges University, Yichang 443002, China |
| |
| Abstract: | Based on the Peierls-Hubbard model,the ground state of the quasi-one-dimensional organic ferromagnets is studied by means of Hartree-Fock approximation.Due to the competition between the nearest and the next-nearest neighbor interaction,the spin coupling along the main chain will be ferromagnetic or antiferromagnetic.Mediated by the ferromagnetic spin density wave or the antiferromagnetic spin density wave along the main chain,a parallel spin arrangement of the unpaired electrons at side radical can be obtained,and the ground state of the system is ferromagnetic of high-spin. |
| |
| Keywords: | Peierls-Hubbard model organic ferromagnets spin coupling |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
