钛酸钡
压电响应力显微镜
材料科学
相变
铁电性
凝聚态物理
退火(玻璃)
钛酸酯
二次谐波产生
钡
相(物质)
光电子学
化学
光学
物理
陶瓷
复合材料
冶金
激光器
有机化学
电介质
作者
Jiesu Wang,Kuijuan Jin,Hongbao Yao,Junxing Gu,Xiulai Xu,Chen Ge,Can Wang,Meng He,Guozhen Yang
摘要
More and more evidence points out the coexistence of displacive and order-disorder dynamics in the phase transition of barium titanate. Here, we report an initial state determined phase transition in barium titanate by applying second harmonic generation technology and piezoresponse force microscopy (PFM). The out-of-plane PFM results of these barium titanate crystals show the increase in domain walls in the surfaces after annealing, leading to the increase in the second harmonic signal measured. This work directly revealed how the displacive and order-disorder dominate the phase transition and what the role is that the domain wall plays in this process.
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