Role of point defects in the formation of relaxor ferroelectrics
发布时间：2025-04-30
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- 发布时间：
- 2025-04-30
- 论文名称：
- Role of point defects in the formation of relaxor ferroelectrics
- 发表刊物：
- Acta Materilia
- 摘要：
- Relaxor ferroelectrics are engineered by doping a large amount of point defects into normal ferroelectrics. The point defects create nanoscale compositional heterogeneity, which in turn lead to local Curie temperature (TC) variation and random local electric and strain fields. However, it is still unclear about the individual roles played by each of these effects in converting a normal ferroelectric into a relaxor. In this study we distinguish these effects by carryout computer simulations using the phase field method. We find that although both the local-field and local-TC effects could lead to the formation of nanodomains in relaxors, it is the former that leads to the appearance of Burns temperature TB, the latter that leads to the appearance of the intermediate temperature T*, and a combination of the two allows one to model all three characteristic temperatures of a relaxor reported in experiments: TB, T* and the freezing …
- 合写作者：
- Zhengkai Hong; Xiaoqin Ke; Dong Wang; Sen Yang; Xiaobing Ren; Yunzhi Wang
- 卷号：
- 225
- 页面范围：
- 117558
- 是否译文：
- 否
- 发表时间：
- 2022-02-15