Amendment to the Multiferroic Landau Model of BiFeO_3

doi:10.3969/j.issn.1000-1565.2009.06.006

Abstract

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

CLC Number:

O469

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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