This paper describes the effect of microstructural features such as grain boundaries and triple points on the pinning of domain wall motion in perovskite Pb(Zr_0.52Ti_0.48)O₃ (PZT) films on polycrystalline SrRuO₃/SrTiO₃ substrates. Spatial variability in the collective domain wall dynamics was assessed using non-linearity mapping via Band Excitation Piezoresponse Force Microscopy (BE-PFM). Collocating the non-linearity maps with triple point locations (as visualized by EBSD) allowed for exploration of the effects that local microstructure (e.g., grain boundary) have on domain wall motion. It was found that the extrinsic behavior varied with both the misorientation angle and the proximity to the grain boundary. The width of influence of individual grain boundaries on the motion of domain walls was a function of the character of the grain boundary; random grain boundaries exhibit deeper minima in α_d/d_33,initial and larger widths of influence (up to 905 nm) compared to coincident site lattice (CSL) boundaries (up to 572 nm). Additionally, triple points containing larger numbers of random boundaries exhibited non-Rayleigh behavior to greater distances, suggesting that the triple point provides either a deep potential minimum or a region where domain wall motion is unfavorable.

本文描述了晶界和三相点等微观结构特征对钙钛矿 Pb(Zr _0.52 Ti _0.48 )O ₃ (PZT) 薄膜在多晶 SrRuO ₃ /SrTiO _{3上的畴壁运动钉扎的影响}基板。使用非线性映射通过带激励压电响应力显微镜 (BE-PFM) 评估集体畴壁动力学的空间变异性。将非线性图与三重点位置（如 EBSD 可视化）并置允许探索局部微观结构（例如，晶界）对畴壁运动的影响。结果发现，外在行为随取向差角和与晶界的接近程度而变化。单个晶界对畴壁运动的影响宽度是晶界特性的函数；随机晶界在 α _d /d _{33 中表现出更深的最小值，初始}与重合点阵 (CSL) 边界（高达 572 nm）相比，影响宽度更大（高达 905 nm）。此外，包含大量随机边界的三重点在更远的距离上表现出非瑞利行为，这表明三重点提供了深潜在最小值或畴壁运动不利的区域。