Theory of Polarization Reversals in Ferroelectrics Based on Landau-Type Free Energy
Theory of Polarization Reversals in Ferroelectrics Based on Landau-Type Free Energy
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基于Landau型自由能的铁电体极化反转理论
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发表时间：
1992
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通讯作者：
Y. Ishibashi
中科院分区：
文献类型：
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作者：
Y. Ishibashi
通过求解基于朗道自由能函数的速率方程，讨论了铁电材料中的极化反转现象。根据幂定律，发现开关时间ts近似依赖于所施加的电场E，即tsproptE-m，其中m根据ts的定义而不同。极化反转过程符合Kolmogorov-Avrami公式，其中描述反转磁区维度的指数n约为1.3。
The rate equations based upon the Landau-type free energy function are solved to discuss the polarization reversals in ferroelectrics. The switching time ts is found to approximately depend upon the applied field E according to a power law, i.e., tsproptE-m, with m differing according to the definition of ts. The polarization reversal process fits the Kolmogorov-Avrami formula, where the index n describing the dimensionality of the reversed domains is found to be about 1.3.