W. Cao, Y. Yue, S. Qu, Keyu Zheng, R. K. Pan, Y. Qi, Lei Zhang
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Mechanism of double-loop and double-dielectric-peak in antiferroelectrics
Abstract Antiferroelectric double loops and double dielectric peaks occurred at an electric field circle synchronously are confirmed theretically by solving the kittel’s function with the idea of different responses of dipoles to applied electric field (E) in E-direction and anti-E-direction in antiferroelectrics. By solving problem of inversion of dipoles to ferroelectric phase controlled by thermodynamic parameters and the antiferroelectric coupling coefficient in antiferroelectric phase, the numerically simulated results exhibit that antiferroelectric phase can transform to ferroelectric phase with two approaches: decrease in temperature to a critical temperature, and increase in parameter α0. The results are well coincident with experimental results.
期刊介绍:
Ferroelectrics Letters is a separately published section of the international journal Ferroelectrics. Both sections publish theoretical, experimental and applied papers on ferroelectrics and related materials, including ferroelastics, ferroelectric ferromagnetics, electrooptics, piezoelectrics, pyroelectrics, nonlinear dielectrics, polymers and liquid crystals.
Ferroelectrics Letters permits the rapid publication of important, quality, short original papers on the theory, synthesis, properties and applications of ferroelectrics and related materials.