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arXiv 0911.5586cond-mat.stat-mech
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有限Cayley树上Blume-Emery-Griffiths模型的铁磁性

Ferromagnetism in the Blume-Emery-Griffiths model on finite-size Cayley tree

Wen-Jun Chen, Xiang-Mu Kong

摘要:

利用精确递推方法研究了有限尺寸Cayley树上自旋为1的BEG模型的铁磁性质。详细研究了不同约化晶场相互作用D/J值时系统的自发磁化,发现当D/J>2.0时,系统出现反常行为(反居里温度)。我们还得到了这个有限尺寸系统的居里温度。当系统尺寸足够大时,我们的结果与热力学极限下的结果吻合得很好。

英文摘要:

The ferromagnetic properties of the spin-1 BEG model on finite-size Cayley tree are investigated using the exact recursion method. The spontaneous magnetization of the system is studied in detail for different values of the reduced crystal-field interaction D/J, and it is found that there is an unusual behavior (anti-Curie temperature) when D/J>2.0. We also obtain the Curie temperature of this finite-size system. When the system size is large enough, our results will fit well with that in the thermodynamic limit.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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