| Magnetic Properties of a Mixed Spin-2 and Spin-5/2 Heisenberg Ferrimagnetic System on a Two-Dimensional Honeycomb Lattice： Green＇s Function Approach |
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| 引用本文： | YAO Kai-Lun LI Jian-Wen LIU Zu-Li FU Hua-Hua ZU Lin. Magnetic Properties of a Mixed Spin-2 and Spin-5/2 Heisenberg Ferrimagnetic System on a Two-Dimensional Honeycomb Lattice： Green＇s Function Approach[J]. 理论物理通讯, 2007, 47(4): 741-746 |
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| 作者姓名： | YAO Kai-Lun LI Jian-Wen LIU Zu-Li FU Hua-Hua ZU Lin |
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| 作者单位： | [1]Department of Physics, Huazhong University of Science and Technology, Wuhan 430074, China [2]International Center of Material Physics, the Chinese Academy of Sciences, Shenyang 110015, China |
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| 基金项目： | The project supported by National Natural Science Foundation of China under Grant Nos. 10574048 and 20490210 |
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| 摘 要： | The multisublattice Green＇s function technique is applied to study the magnetic properties of a mixed spin-2 and spin-5/2 Heisenberg ferrimagnetic system on a two-dimensional honeycomb lattice. The role of the different interactions in the Hamiltonian is explored. When only the nearest-neighbor interaction and the single-ion anisotropy are included, our results indicate that there are compensation points at finite temperatures. When the next-nearest-neighbor interaction exceeds a minimum value that depends on the other parameters in the Hamiltonian, the compensation point disappears. The next-nearest-neighbor interaction has the effect of changing the compensation temperature.
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| 关 键 词： | Heisenberg铁磁系统 二维蜂窝晶格 Green函数 自旋波谱 磁化性质 |
| 收稿时间： | 2006-04-30 |
| 修稿时间： | 2006-04-30 |
Magnetic Properties of a Mixed Spin-2 and Spin-5/2 Heisenberg Ferrimagnetic System on a Two-Dimensional Honeycomb Lattice:Green's Function Approach |
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| YAO Kai-Lun,LI Jian-Wen,LIU Zu-Li,FU Hua-Hua,ZU Lin,. Magnetic Properties of a Mixed Spin-2 and Spin-5/2 Heisenberg Ferrimagnetic System on a Two-Dimensional Honeycomb Lattice:Green's Function Approach[J]. Communications in Theoretical Physics, 2007, 47(4): 741-746 |
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| Authors: | YAO Kai-Lun LI Jian-Wen LIU Zu-Li FU Hua-Hua ZU Lin |
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| Affiliation: | 1. Department of Physics, Huazhong University of Science and Technology, Wuhan 430074, China;2. International Center of Material Physics, the Chinese Academy of Sciences,Shenyang 110015, China |
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| Abstract: | Themultisublattice Green's function technique is applied to study the magnetic properties of a mixed spin-2 and spin-5/2 Heisenberg ferrimagnetic system on a two-dimensional honeycomb lattice.The role of the different interactions in the Hamiltonian is explored.When only the nearest-neighbor interaction and the single-ion anisotropyare included,our results indicate that there are compensation points at finite temperatures.When the next-nearest-neighbor interaction exceeds a minimum value that depends on the other parameters in the Hamiltonian,the compensation point disappears.The next-nearest-neighbor interaction has the effect of changing the compensation temperature. |
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| Keywords: | Heisenberg ferrimagnetic Green function spin-wave spectra magnetization critical temperature compensation temperature |
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