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Monte Carlo simulation of dieletric properties of the antiferroelectric/ferroelectric BiFeO3/YMnO3 bilayer in the external electric field

2019; Elsevier BV; Volume: 110; Linguagem: Inglês

10.1016/j.physe.2019.02.022

1873-1759

Zeyuan Wang, Wei Wang, Qi Li, Ming Tian, Zhong-yue Gao, Ying Liu,

Advanced Condensed Matter Physics

Monte Carlo simulation has been used to study the dielectric properties of an antiferroelectric/ferroelectric Ising bilayer structure which consists of the top layer with spin-5/2 and the bottom layer with spin-2. The effects of the crystal-fields, the exchange couplings and the external electric field on the polarization, the dielectric susceptibility, the internal energy, the specific heat and the blocking temperature of the mixed-spin bilayer system have been examined detailedly. In particular, the phase diagrams of the blocking temperature under the effects of various physical parameters are obtained for the present system. Through a comparison, there is in agreement between our results obtained and other theoretical studies as well as experimental results.