Abstract Based on the phenomenological theory of Landau–Ginzburg–Devonshire, the singularities of the phase transition in a thin ferroelectric film in external electric field are investigated depending on the film thickness and the type of polarization fixed on its planes. It was found that in electric field the phase transition shifts in temperature, and the shift value depends on the film thickness and the properties of its planes. In the linear approximation at the weak fields, the temperature shift of phase transition does not depend on the field strength until a certain definite value. For ferroelectric triglycine sulfate film with the thickness 35 nm, this value is 116 V/cm.

中文翻译：

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外电场对薄膜铁电体相变的影响

摘要 基于Landau-Ginzburg-Devonshire的现象学理论，研究了外电场作用下铁电薄膜中相变奇点与薄膜厚度和固定在其平面上的极化类型的关系。发现在电场中，相变随温度发生变化，而变化值取决于薄膜厚度及其平面的性质。在弱场的线性近似中，相变的温度变化不依赖于场强，直到某个确定值。对于厚度为 35 nm 的铁电三甘氨酸硫酸盐膜，该值为 116 V/cm。