Analysis of polarization offsets observed for temperature-graded ferroelectric materials

作者：Chen, Hui^*; Cheng, Taimin; Zheng, Hanlei; Zhang, Xinxin

来源：Physics Letters, Section A: General, Atomic and Solid State Physics , 2016, 380(17): 1562-1565.

DOI：10.1016/j.physleta.2016.02.033

• Ferroelectric material
• Temperature gradient
• Polarization offset

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 two spin 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 temperature graded 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.

• 出版日期2016-4-8
• 单位沈阳化工大学