Existence of a quadruple point in a binary ferroelectric phase diagram
发布时间：2025-04-30
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- 发布时间：
- 2025-04-30
- 论文名称：
- Existence of a quadruple point in a binary ferroelectric phase diagram
- 发表刊物：
- Physical Review B
- 摘要：
- In experimentally measured temperature-composition ferroelectric phase diagrams of BaTiO 3-based binary systems, a quadruple point where cubic (C), tetragonal (T), orthorhombic (O), and rhombohedral (R) phases converge has been frequently reported in previous work. More interestingly, the quadruple points are experimentally found to behave as a critical point with large enhancement in properties. However, it has remained a fundamental question as to whether a quadruple point in a binary ferroelectric system defies the thermodynamic phase rule and whether such a point necessarily goes critical. In this study, it is demonstrated by Landau theory that a CTOR quadruple point in a binary ferroelectric system can only exist in the form of a unique type of critical point at which two first-order transition lines and two second-order ones meet, and such critical quadruple points do not defy the thermodynamic phase …
- 合写作者：
- Xiaoqin Ke; Sen Yang; Yu Wang; Dong Wang; Luo Zhao; Jinghui Gao; Yunzhi Wang; Xiaobing Re n
- 卷号：
- 103
- 页面范围：
- 085132
- 是否译文：
- 否
- 发表时间：
- 2021-02-22