Microscopic Theory of Nonlinear Spin Waves in Ferromagnets
Considering the attractive interaction between ferromagnet, we propose the model of magnon-pairs, which two magnons with opposite wave vectors in a Heisenberg is suitable for low-temperature environment. A dressed magnon is an energy quantum of the magnon-pairs whose energy is a monotonically increa...
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| Veröffentlicht in: | 理论物理通讯：英文版 2011, Vol.56 (7), p.173-176 |
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| container_title | 理论物理通讯：英文版 |
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| creator | 张建军 袁建辉 曾奇军 张俊佩 |
| description | Considering the attractive interaction between ferromagnet, we propose the model of magnon-pairs, which two magnons with opposite wave vectors in a Heisenberg is suitable for low-temperature environment. A dressed magnon is an energy quantum of the magnon-pairs whose energy is a monotonically increasing function of absolute temperature. Based on the model, we re-investigate the excitation mechanism and thermodynamic properties of the Heisenberg ferromagnet. The correction factor e（O） plays an important role in studying the low-temperature properties of a ferromagnet. |
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| identifier | ISSN: 0253-6102 |
| ispartof | 理论物理通讯：英文版, 2011, Vol.56 (7), p.173-176 |
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| source | IOP Publishing Journals; Institute of Physics (IOP) Journals - HEAL-Link; Alma/SFX Local Collection |
| subjects | 低温环境 单调递增函数 微观理论 热力学性质 相互作用 自旋波 铁磁体 非线性 |
| title | Microscopic Theory of Nonlinear Spin Waves in Ferromagnets |
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