开一个新坑：每周至少分析三篇顶刊的写作思路，来提升自己的写作能力。今天是1/3
AM：高性能电致伸缩弛豫体通过分散的内部的纳米析出物
通过构建Sm掺杂的0 0.015的PIN-PZT样品得到了很高的电致伸缩系数(8 × 10−16 m2 V−2) 性能
1. 基本的思路：
第一步：Sm-PNZT 样品的性能和其他样品的对比
中心：M33在所有的弛豫铁电体中性能最高
第二步：通过宏观的TEM说明看到的沉淀析出相和析出相之外的畴结构
第三步：纳米沉淀析出相的结构极化矢量以及文字论述为什么能够减小滞后
其实有图表明了Sm掺杂之前存在滞后但还是放在了参考文献当中，对比并不是这篇文章想说的，而是对这个材料本身的论述才是这篇文章想要传达的。
文字论述为什么能够减小滞后：
1. both the magnitude and angle of the polarization vectors continuously evolved from the outside to the center of the endotaxial nanoprecipitation.
2. the polarization magnitude decreased to nearly zero at the central region, yielding a nonpolar state.
3. Such evolutions of the polarizations strongly break the long-range ferroelectric ordering, which results in a more flexible polarization configuration and further enhances the dielectric relaxation performance
Based on these observations, the domain structure was constructed as illustrated in Figure 3h, which can well explain the origin of the high electrostrain performance. In the matrix region, the PNRs with R and T symmetries are randomly distributed in the C matrix, providing a strong polarization response as well as a large strain under a relatively weak electric field. This is consistent with the role of PNRs in RFEs reported in previous studies.[16,39] However, the randomly distributed endotaxial nanoprecipitations feature a transitional ring region with a sharply changing polarization in terms of both direction and magnitude, indicating the weak constraint of the local crystallographic symmetry, and a nonpolar central region. Such endotaxial nanoprecipitations are essentially induced by the cooperation of the segregated A-site and B-site elements and are markedly different from the C phase nanoregions in the matrix, especially in terms of their behaviors under external electric fields. Specifically, the C phase nanoregions in the matrix are formed owing to the free energy fluctuation and the strong random electric field, and are highly polarizable under the electric field stimuli. In contrast, the nonpolar central region of the endotaxial nanoprecipitations caused by the enrichment of Sm3+ cations is difficult to polarize even by a strong electric field. As a result, the endotaxial nanoprecipitations with a nonpolar central region can provide a strong restoring force, which facilitates the transformation from a normal ferroelectric state to a relaxor state upon unloading. This results in a faster strain response to the external electric field, namely, a hysteresis-free strain response.
基于这些观察，我们构建了如图3h所示的畴结构，可以很好地解释高电应变性能的起源。在矩阵区域，具有R和T对称的PNRs随机分布在C矩阵中，在相对较弱的电场作用下，PNRs具有较强的极化响应和较大的应变。这与以往研究中报道的PNRs在rfe中的作用一致。[16,39]然而，随机分布的胞内纳米沉淀物在方向和大小上极化急剧变化的过渡环区，表明局部晶体对称性约束较弱，中心区域为非极性区域。这种内层纳米沉淀物主要是由分离的a位和b位元素共同作用而形成的，与基体中的C相纳米区明显不同，特别是在外加电场作用下的行为。其中，基体中的C相纳米区是由于自由能涨落和强随机场形成的，在电场刺激下具有很强的极化性。相反，由于Sm3+离子的富集而形成的胞内纳米沉淀物的非极性中心区域即使在强电场作用下也难以极化。结果表明，具有非极性中心区域的内嵌纳米沉淀物具有很强的还原力，有利于从正常铁电态向弛豫态的转变。这导致了对外部电场的更快应变响应，即无迟滞应变响应。（其实这也可以说是储能性能提高的原因，如何在薄膜中构建这种由成分偏析带来的局部的非极性相的析出呢？是不是也是一个重要的方向）
第四步：通过原位电场XRD证明外部的响应来自于晶格的应变
这一段实则是想建立外部应变与内部应变的关系的一个手段，归因于晶格应变，
1. The lattice strain, calculated from the {200}pc peak shift in the 0° sector, was comparable to the macrostrain (Figure 4d), suggesting that the macrostrain mainly originated from the intrinsic lattice strain.
2，By analyzing the evolution of the {200}pc peak in the 0° sector under the cyclic electric field (Figure 4c), it was found that the peak shifted without any change in the peak profile when the electric field was applied and removed. This suggests that no noticeable macrodomain switching occurred during the electric field loading–unloading procedure.
3. In contrast, the peaks of {200}pc and {111}pc in the 45° sector (Figure 4a,b) showed a negligible shift and profile change with the changing electric field, indicating the lack of phase transition.
4. Therefore, the easy growth of the inhomogeneous PNRs into the long-range ferroelectric domains facilitates the intrinsic lattice strain of the Sm-PNZT ceramic, leading to a significant response of the macrostrain under a weak electric field.
2. 启发
顶刊AM并不需要严格的对比，把一个样品的故事讲清楚也行
并不需要严格的证明，而是言之有物，言之成理，看上去没有逻辑硬伤即可。
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