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Mechanical Softness of Ferroelectric180°Domain Walls
Physical Review X ( IF 12.5 ) Pub Date : 2020-10-01 , DOI: 10.1103/physrevx.10.041001 Christina Stefani , Louis Ponet , Konstantin Shapovalov , Peng Chen , Eric Langenberg , Darrell G. Schlom , Sergey Artyukhin , Massimiliano Stengel , Neus Domingo , Gustau Catalan
Physical Review X ( IF 12.5 ) Pub Date : 2020-10-01 , DOI: 10.1103/physrevx.10.041001 Christina Stefani , Louis Ponet , Konstantin Shapovalov , Peng Chen , Eric Langenberg , Darrell G. Schlom , Sergey Artyukhin , Massimiliano Stengel , Neus Domingo , Gustau Catalan
Using scanning probe microscopy, we measure the out-of-plane mechanical response of ferroelectric 180° domain walls and observe that, despite separating domains that are mechanically identical, the walls appear mechanically distinct—softer—compared to the domains. This effect is observed in different ferroelectric materials (, , and ) and with different morphologies (from single crystals to thin films), suggesting that the effect is universal. We propose a theoretical framework that explains the domain wall softening and justifies that the effect should be common to all ferroelectrics. The lesson is, therefore, that domain walls are not only functionally different from the domains they separate, but also mechanically distinct.
中文翻译:
铁电体180°畴壁的机械柔软度
使用扫描探针显微镜,我们测量了铁电180°畴壁的平面外机械响应,并观察到,尽管分离的畴在机械上是相同的,但与畴相比,壁在机械上却明显不同(较软)。在不同的铁电材料中观察到了这种效应(, 和 ),并且具有不同的形态(从单晶到薄膜),这表明这种效果是普遍的。我们提出了一个理论框架,该框架解释了畴壁软化并证明所有铁电体都应具有相同的影响。因此,教训是,畴壁不仅在功能上与其分离的畴不同,而且在机械上也各不相同。
更新日期:2020-10-02
中文翻译:
铁电体180°畴壁的机械柔软度
使用扫描探针显微镜,我们测量了铁电180°畴壁的平面外机械响应,并观察到,尽管分离的畴在机械上是相同的,但与畴相比,壁在机械上却明显不同(较软)。在不同的铁电材料中观察到了这种效应(, 和 ),并且具有不同的形态(从单晶到薄膜),这表明这种效果是普遍的。我们提出了一个理论框架,该框架解释了畴壁软化并证明所有铁电体都应具有相同的影响。因此,教训是,畴壁不仅在功能上与其分离的畴不同,而且在机械上也各不相同。