| 磁电耦合对于铁电磁系统的磁性关联的影响 |
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| 引用本文： | 蒋磊.磁电耦合对于铁电磁系统的磁性关联的影响[J].苏州大学学报(医学版),2007,23(1):37-42. |
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| 作者姓名： | 蒋磊 |
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| 作者单位： | 苏州大学物理科学与技术学院 江苏苏州215006 |
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| 摘 要： | 铁电磁系统具有在低温下铁电有序和(反)铁磁有序自发共存的特征,存在内禀的磁电耦合效应.利用了铁电软模理论和基于海森堡模型的平均场近似理论,分别研究了磁电耦合对铁电、铁磁有序共存系统和铁电、反铁磁有序共存系统的磁性质的影响.结果发现在一定的外磁场条件下,无论是铁电、铁磁有序共存的系统还是铁电、反铁磁有序共存的系统,磁电耦合都相当于一个虚拟的外磁场,且系统的铁磁性关联会随着耦合常数的增加而增加.
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| 关 键 词： | 磁电耦合 自旋关联 铁电有序 铁磁有序 反铁磁有序 |
| 文章编号： | 1000-2073（2007）01-0037-06 |
| 收稿时间： | 2006-09-15 |
| 修稿时间： | 2006年9月15日 |
The magnetoelectric coupling effect on the spin correlation for the ferroelectromagnetic system |
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| Jiang Lei.The magnetoelectric coupling effect on the spin correlation for the ferroelectromagnetic system[J].Journal of Suzhou University(Natural Science),2007,23(1):37-42. |
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| Authors: | Jiang Lei |
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| Abstract: | The ferroelectromagnetic lattice is a magnetoelectric coupling system in which the ferroelectric order and(anti)ferromagnetic order coexist simultaneously below a certain temperature.The soft-mode theory for ferroelectric subsystem and the Heisenberg model on the basis of mean-field approximation for magnetic subsystem are utilized to investigate the magnetic property for a system with the coexistence of ferroelectric and ferromagnetic orders as well as a system with the coexistence of ferroelectric and antiferromagnetic orders.We find that under a certain applied magnetic field,the magnetoelectric coupling effect acts like an imaginary magnetic field in both systems and the ferromagnetic property increases with the increasing magnetoelectric coupling coefficient. |
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| Keywords: | magnetoelectric coupling spin correlation ferroelectric order ferromagnetic order antiferromagnetic order |
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