铁电体极化的时空有序化及其热力学补偿  

Spatio-Temporal Ordering of Ferroelectric Polarization and Its Thermodynamic Compensation

作　　者：卢路 俞树荣[1] 郭丹丹 卢小平[1] 

机构地区：[1]兰州理工大学石油化工学院,甘肃 兰州 [2]兰州理工大学能源与动力工程学院,甘肃 兰州

出　　处：《现代物理》2023年第2期23-27,共5页Modern Physics

摘　　要：铁电体的极化效应在信息存储、精密测量、自动控制等方面得到了广泛应用,揭示铁电相与顺电相的反转机制是一个极为重要的科学问题。本论文通过分析孤立系热功转换的时空有序化补偿,发现了临界温度两侧存在具有普遍意义的时空有序化补偿机制,给出了基于调控铁电体临界温度两侧的温度,即通过加热及冷却的方式进行铁电相与顺电相反转的方法,进一步讨论了铁电体中空间对称性破缺时,将导致顺电相反转为铁电相,而当铁电体中空间对称性恢复时,将导致铁电相反转为顺电相。时空有序化补偿理论,不但适用于铁电体中的铁电相与顺电相的反转,而且也适用于铁磁体的铁磁相与顺磁相的相互反转。The polarization effect of ferroelectrics has been widely used in information storage, precise measurement and automatic control. It is an extremely important scientific problem to reveal the reversal mechanism of ferroelectric and paraelectric phases. In this paper, by analyzing the spatiotemporal ordering compensation of heat-work conversion in an isolated system, it is found that there is a universal spatiotemporal ordering compensation mechanism on both sides of the critical temperature. Based on the control of the temperature on both sides of the critical temperature of ferroelectrics, that is, the method of reversing the ferroelectric phase and the paraelectric phase by heating and cooling is given. Furthermore, it is further discussed that when the spatial symmetry breaking occurs in ferroelectrics, the paraelectric phase will be reversed to the ferroelectric phase, and when the spatial symmetry in ferroelectrics is restored, the ferroelectric phase will be reversed to the paraelectric phase. The theory of spatiotemporal ordering compensation is not only applicable to the inversion of ferroelectric and paraelectric phases in ferroelectrics, but also applicable to the mutual inversion of ferromagnetic and paramagnetic phases in ferromagnets.

关 键 词：铁电体 铁磁体 对称性破缺 铁电相 精密测量 顺电相 自动控制 信息存储 

分 类 号：TM2[一般工业技术—材料科学与工程]