Analysis of polarization offsets observed for temperature-graded ferroelectric materials
Analysis of polarization offsets observed for temperature-graded ferroelectric materials
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DOI：
10.1016/j.physleta.2016.02.033
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
Xinxin Zhang
中科院分区：
文献类型：
--
作者：
Hui Chen;Taimin Cheng;Hanlei Zheng;Xinxin Zhang
A transverse Ising model in the framework of the mean field approximation is developed to analyze.the polarization offsets phenomena in temperature-graded ferroelectric materials. A function of twospin exchange interaction strength has been introduced to describe the ferroelectric distortion due.to the distribution of temperature gradients in materials. Comparisons of the computational results.with the experimental data reveal some fundamental factors in the formation of polarization offsets..It is shown that ferroelectric distortion has influenced much on polarization offsets in temperaturegraded ferroelectric materials. When quantum fluctuation effect as well as ferroelectric distortion is.considered, we have successfully reproduced the experimental observations qualitatively, especially for.the indistinguishable polarization offsets from the background at small temperature gradients, which.were not successfully reproduced in prior theoretical studies.
