| 量子波动对CaTiO_3介电行为的影响 |
| |
| 引用本文： | 袁敏,王春雷.量子波动对CaTiO_3介电行为的影响[J].济南大学学报(自然科学版),2009,23(1). |
| |
| 作者姓名： | 袁敏 王春雷 |
| |
| 作者单位： | 1. 济南大学,理学院,山东,济南,250022
2. 山东大学,物理与微电子学院,山东,济南,250100 |
| |
| 基金项目： | 国家重点基础研究发展计划(973计划) |
| |
| 摘 要： | Barrett公式能较好的描述先兆性铁电体及其固溶体的介电常数随温度的变化特点.但在定量的描述上,对于CaTiO3其介电常数不能在整个温度范围内都与实验数据很好的相符,而且得到的居里温度是一个很大的负数.利用改进的Barrett公式,当CaTiO3晶体的零点振动能按照某一个规律由低温时一个较小值变化到较高温度时一个较大值时,上述问题可以得到圆满地解决.由此得到CaTiO3的零点振动是随温度变化的.
|
| 关 键 词： | 先兆性铁电体 介电行为 量子波动 |
Influence of Quantum Fluctuation on the Dielectric Behavior of Calcium Titanate |
| |
| YUAN Min,WANG Chun-lei.Influence of Quantum Fluctuation on the Dielectric Behavior of Calcium Titanate[J].Journal of Jinan University(Science & Technology),2009,23(1). |
| |
| Authors: | YUAN Min WANG Chun-lei |
| |
| Institution: | 1.School of Science;University of Jinan;Jinan 250022;China;2.School of Physics and Microelectronics;Shandong University;Jinan 250100;China |
| |
| Abstract: | Instead of constant value of the saturation temperature in conventional Barrett formula,it is assumed changing with temperature.By fitting this improved expression with experimental data of calcium titanate,physical reasonable parameters have been obtained.This implies that the quantum fluctuation in calcium titanate,which relates to the saturation temperature,changes from a relative small value at low temperature to a large value at high temperature. |
| |
| Keywords: | incipient ferroelectric dielectric response quantum fluctuation |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
