XAFS study on the structural phase transition in PbTiO3

被引：0
|
作者：
Miyanaga, T [1 ]
Diop, D [1 ]
Ikeda, S [1 ]
Kon, H [1 ]
机构：
[1] Hirosaki Univ, Fac Sci, Dept Mat Sci & Technol, Hirosaki, Aomori 0368561, Japan
来源：
PHYSICS IN LOCAL LATTICE DISTORTIONS: FUNDAMENTALS AND NOVEL CONCEPTS LLD2K | 2001年 / 554卷
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中图分类号：
O59 [应用物理学];
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摘要：
The pb L-III-edge EXAFS for PbTiO3 was measured in the temperature range From 20K to 873K. Three types of atomic pairs, shorter Pb-O(1), medium Pb-O(2) and longer Pb-O(3) were analyzed independently. The former two Pb-O pairs show the "order-disorder" type phase transition; Pb-O distance does not change through T-c. On the other hand the last one shows the "displacive" type; the interatomic distance decreases discontinuously at T-c and the mean square relative displacement shows the soft mode behavior.
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页码：304 / 308
页数：5
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