| A(B0.51B0.52)O3系统中三种有序态的稳定性初探 |
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| 引用本文： | 王强,顾秉林,张孝文.A(B0.51B0.52)O3系统中三种有序态的稳定性初探[J].物理学报,1991,40(3):498-504. |
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| 作者姓名： | 王强 顾秉林 张孝文 |
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| 作者单位： | (1)清华大学材料科学与工程系,100084; (2)清华大学现代应用物理系,100084;中国高等科学技术中心世界实验室 |
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| 摘 要： | 在A(BB0.51B0.52)O3钙钛矿型铁电陶瓷材料中,除了在较高温度下都能有稳定的<111>型超格子有序结构外,在室温和-150℃情况下,还分别观察到1/2<110>和1/2<100>型超格子有序结构,本文引入长程相互作用,并利用8点集团变分模型,在不同温度范围内分析了前面三种有序态的稳定性,所得结论与实验结果一致。
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| 关 键 词： | 铁电陶瓷材料 有序态 稳定性 |
| 收稿时间： | 1990-03-27 |
STABILITY OF THREE KINDS OF ORDERED STRUCTURES IN A (B0.51B0.52)O3 FERROELECTRICS |
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| WANG QIAN,GU BING-LIN and ZHANG XIAO-WEN.STABILITY OF THREE KINDS OF ORDERED STRUCTURES IN A (B0.51B0.52)O3 FERROELECTRICS[J].Acta Physica Sinica,1991,40(3):498-504. |
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| Authors: | WANG QIAN GU BING-LIN and ZHANG XIAO-WEN |
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| Abstract: | In A(BB0.51B0.52)O3 perovskite-like ferroelectrics. besides the stable 1/2〈lll〉-typeordered structure, two new kinds oi ordered structures, 1/2〈110〉 and 1/2〈100〉 superlattices, have been observed at room temperature and -150℃ respectively. In this paper, the longrange interactions are introduced into the eight-point cluster variation method to analyse the stabilities of the three kinds of ordered structures. The results are in good agreement with experimental observations. |
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