铁电性
材料科学
居里温度
陶瓷
凝聚态物理
电致伸缩
电介质
相变
电阻率和电导率
压电
复合材料
光电子学
铁磁性
物理
量子力学
作者
Zhifeng Xiao,Tianqi Xiao,S. Y. Wang,Shan Huang,Boda Wei,W.F. Liu
摘要
Abstract The quasi‐two‐dimensional Ruddlesden–Popper material, Sr 3 Sn 2 O 7 with hybrid improper ferroelectricity, has gained significant scientific interest owing to its unique ferroelectric phase transition mechanism. However, its electrical behaviors near the phase transition temperature necessitate further investigation. In this study, high‐quality Sr 3 Sn 2 O 7 ceramic was successfully prepared, and its temperature‐dependent electrical properties were systematically studied. The phase transition from ferroelectric to paraelectric of Sr 3 Sn 2 O 7 ceramic near 160°C was evidenced by the varying electrical properties dependence of temperature. It is found that the space‐charge‐limited bulk conduction with deep traps is identified as dominant conduction mechanism for Sr 3 Sn 2 O 7 ceramic that has high resistivity. An abnormal increasing trend of coercive field with temperature was observed and is discussed with trap‐filling process and octahedral rotation distortion. Interestingly, Sr 3 Sn 2 O 7 ceramic exhibits negative piezoelectric effect and negative electrostriction responded to biased electric field, which is dramatically influenced by ferroelectric polarization. Overall, this study serves as a reference for exploring the electrical properties of other hybrid improper ferroelectrics, particularly near their Curie temperature.
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