LOCAL STRUCTURAL DISTORTIONS BELOW AND ABOVE THE ANTIFERRODISTORTIVE PHASE-TRANSITION

被引：55

作者：

RECHAV, B ^{[1
]}

YACOBY, Y ^{[1
]}

STERN, EA ^{[1
]}

REHR, JJ ^{[1
]}

NEWVILLE, M ^{[1
]}

机构：

[1] UNIV WASHINGTON,DEPT PHYS FM15,SEATTLE,WA 98195

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 72卷 / 09期

关键词：

D O I：

10.1103/PhysRevLett.72.1352

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Quantitative measurements of oxygen octahedra local rotation angles are reported for the antiferrodistortive type perovskites, Na0.82K0.18TaO3 and NaTaO3. The results were obtained using a detailed analysis of x-ray absorption fine structure spectra. These results show that the oxygen octahedra rotation angle at the peak of the rotation angle distribution function of an antiferrodistortive crystal is nonzero and large, hundreds of degrees above the transition temperature.

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页码：1352 / 1355

页数：4

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