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| 耦合作用下有机铁磁链的临界行为 | |
| 引用本文： | 郭继勇,陈宇光,陈鸿. 耦合作用下有机铁磁链的临界行为[J]. 中国物理, 2005, 14(4): 821-825 |
| 作者姓名： | 郭继勇 陈宇光 陈鸿 |
| 作者单位： | Pohl Institute for Solid State Physics, Tongji University,Shanghai, 200092, China;Pohl Institute for Solid State Physics, Tongji University,Shanghai, 200092, China;Pohl Institute for Solid State Physics, Tongji University,Shanghai, 200092, China |
| 基金项目： | Project supported by the National Natural Science Foundation of China (Grant Nos 10304014,19904007 and 90103022) |
| 摘 要： | 利用平均场，我们研究了一个具有链间耦合作用的有机铁磁模型，并给出了该模型的全相图。计算表明，链间耦合强烈影响其基态的磁序。当链间耦合达到某临界值时，高自旋基态消失，整个系统由铁磁相转变为近藤单态（Kondo-singlet）相。 |
| 关 键 词： | 链间耦合；有机铁磁；二聚化 |
| 收稿时间： | 2004-10-09 |
Critical behaviour of coupled organic ferromagnet chains |
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| Guo Ji-Yong,Chen Yu-Guang and Chen Hong. Critical behaviour of coupled organic ferromagnet chains[J]. Chinese Physics, 2005, 14(4): 821-825 | |
| Authors: | Guo Ji-Yong Chen Yu-Guang Chen Hong |
| Affiliation: | Pohl Institute for Solid State Physics, Tongji University,Shanghai, 200092, China |
| Abstract: | The interchain coupling in a model, which is most relevant to organic ferromagnets, is studied by a kind of mean field theory. A full phase diagram is given for this model. It is shown that the interchain coupling dramatically affects the ferromagnetic order in the ground state. When the interchain coupling reaches a critical value, the high-spin ground state disappears and the system may transit from ferromagnetic phase into Kondo-singlet phase. |
| Keywords: | interchain coupling organic ferromagnets dimerization |
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