| 低温下一维绝缘铁磁链的磁振子软化 |
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| 引用本文： | 成泰民.低温下一维绝缘铁磁链的磁振子软化[J].辽宁师范大学学报(自然科学版),2005,28(2):174-177. |
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| 作者姓名： | 成泰民 |
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| 作者单位： | 东北大学,理学院,物理系,辽宁,沈阳,110006 |
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| 基金项目： | 国家自然科学基金资助项目(59471020)，高等学校博士学科点基金资助项目(98014513) |
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| 摘 要： | 在一维绝缘铁磁链系统基础上建立了1个磁振子一声子相互作用模型．利用格林函数方法研究了磁振子一声子相互作用下的一维绝缘铁磁链的磁振子谱，计算了布里渊区的磁振子色散曲线．发现在布里渊区边界区域磁振子谱的软化和磁振子谱线增宽最明显．也讨论了各项参数的变化对磁振子谱的软化与磁振子谱线增宽的影响。
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| 关 键 词： | 磁振子-声子相互作用 磁振子软化 铁磁体 磁振子谱线增宽 |
| 文章编号： | 1000-1735(2005)02-0174-04 |
| 修稿时间： | 2005年2月25日 |
The Softening of Magnon of One Dimensional Insulating Ferromagnetic Chain under Low Temperature |
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| CHENG Tai-min.The Softening of Magnon of One Dimensional Insulating Ferromagnetic Chain under Low Temperature[J].Journal of Liaoning Normal University(Natural Science Edition),2005,28(2):174-177. |
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| Authors: | CHENG Tai-min |
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| Abstract: | A magnon-phonon interaction model is built in one dimensional insulating ferromagnetic chain. By using Matsubara Green function theory, we have studied the magnon spectrum, and calculated the magnon dispersion curve on the Brillouin Zone for different parameters in the system. It is concluded that at the boundary of Brillouin Zone there is a strong broadening in the magnon linewidth and softening, and the influences of the parameters are also illustrated. |
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| Keywords: | magnon-phonon interaction softening of magnon mode ferromagnetic broadening in the magnon linewidth |
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