铁电180度壁在机械上比它们分开的畴更软
Ferroelectric 180 degree walls are mechanically softer than the domains they separate
摘要：
畴壁在功能上不同于它们所分隔的畴，但对它们的机械性质知之甚少。使用扫描探针显微镜，我们已经测量了铁电180 °畴壁的机械响应，并观察到，尽管分离域是机械相同的（非铁弹性），壁是机械不同的-软-相比的域。在不同的铁电材料（LiNbO3、BaTiO3、PbTiO3）和不同的形貌（从单晶到薄膜）中观察到了这种效应，因此它似乎是普遍的。我们提出了一个理论框架，解释畴壁软化和证明的效果应该是共同的所有铁电体。
英文摘要：
Domain walls are functionally different from the domains they separate, but little is known about their mechanical properties. Using scanning probe microscopy, we have measured the mechanical response of ferroelectric 180o domain walls and observed that, despite separating domains that are mechanically identical (non-ferroelastic), the walls are mechanically distinct -- softer -- compared to the domains. This effect has been observed in different ferroelectric materials (LiNbO3, BaTiO3, PbTiO3) and with different morphologies (from single crystals to thin films) so it appears to be universal. We propose a theoretical framework that explains the domain wall softening and justifies that the effect should be common to all ferroelectrics.
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