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arXiv · 2410.12929

Influence of pressure on the kinetics of ferroelectric phase transition in BaTiO3

Olga Mazur·Ken-ichi Tozaki·Yukio Yoshimura·Leonid Stefanovich
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Abstract

The ferroelectric phase transition in barium titanate under pressure was studied within the framework of Landau-Ginzburg theory using differential scanning calorimetry. An innovative method for high-sensitive thermal measurements under pressure was demonstrated. It was shown that the relaxation process proceeds nonmonotonically with the formation of intermediate short-lived phases. It was established that polydomain ordering is preferred but the monodomenization of the sample is possible under certain conditions. A narrowing of the temperature hysteresis with increasing pressure was revealed. A new tricritical point in barium titanate crystals characterizing the changing of the phase transition has been experimentally determined and theoretically confirmed.

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Olga Mazur, Ken-ichi Tozaki, Yukio Yoshimura, Leonid Stefanovich. 2024-10-16. Influence of pressure on the kinetics of ferroelectric phase transition in BaTiO3. https://doi.org/10.1016/j.physa.2022.127436%2010.1016%2Fj.physa.2022.127436

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