BiFeO_3多铁Landau模型的修正

doi:10.3969/j.issn.1000-1565.2009.06.006

河北大学学报(自然科学版) ›› 2009, Vol. 29 ›› Issue (6): 577-581.DOI: 10.3969/j.issn.1000-1565.2009.06.006

BiFeO_3多铁Landau模型的修正

王英龙,王兴远,丁学成,梁伟华,邓泽超,褚立志,傅广生

河北大学,物理科学与技术学院,河北,保定,071002

出版日期:2009-11-25 发布日期:2009-11-25
基金资助:
973 计划项目，国家自然科学基金，河北省自然科学基金，河北大学科研基金

Amendment to the Multiferroic Landau Model of BiFeO_3

WANG Ying-long,WANG Xing-yuan,DING Xue-cheng,LIANG Wei-hua,DENG Ze-chao,CHU Li-zhi,FU Guang-sheng

Online:2009-11-25 Published:2009-11-25

摘要/Abstract

摘要： 考虑到Landau自由能在平衡态时必须是稳定的以及Landau唯象模型中的每一个序参量都必须是实数,BiFeO_3材料的Landau自由能展开系数被重新计算.利用这些参数,模拟了电滞回线、磁滞回线和随外加磁场变化的磁电耦合系数,理论结果与最近报道的实验结果吻合得很好.

关键词: BiFeO_3, 多铁Landau模型, 电滞回线, 磁滞回线, 磁电耦合

Abstract: Considering both Landau free energy at thermodynamic equilibrium state should be stable and every order parameter should be real in extensive Landau-type phenomenological theory, we have obtained Landau expansion coefficients of BiFeO_3 materials. The magnetization hysteresis loop, polarization hysteresis loop, and the magnetic field dependence of the magnetoelectric coefficient are calculated, which are in good agreement with experimental data reported in previous literatures.

Key words: BiFeO_3, multiferroic Landau model, polarization hysteresis loop, magnetization hysteresis loop, magnetoelectric coupling

中图分类号:

O469

王英龙,王兴远,丁学成,梁伟华,邓泽超,褚立志,傅广生. BiFeO_3多铁Landau模型的修正[J]. 河北大学学报(自然科学版), 2009, 29(6): 577-581.

WANG Ying-long,WANG Xing-yuan,DING Xue-cheng,LIANG Wei-hua,DENG Ze-chao,CHU Li-zhi,FU Guang-sheng. Amendment to the Multiferroic Landau Model of BiFeO_3[J]. Journal of Hebei University (Natural Science Edition), 2009, 29(6): 577-581.

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BiFeO_3多铁Landau模型的修正

Amendment to the Multiferroic Landau Model of BiFeO_3

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