Elastic properties of perovskite YCrO3 up to 60 GPa

被引：27

作者：

Ardit, M. ^{[1
]}

Cruciani, G. ^{[1
]}

Dondi, M. ^{[2
]}

Merlini, M. ^{[3
]}

Bouvier, P. ^{[4
,5
]}

机构：

[1] Univ Ferrara, Dept Earth Sci, I-44100 Ferrara, Italy

[2] ISTEC, CNR, I-48018 Faenza, Italy

[3] Univ Milan, Dept Earth Sci, I-20133 Milan, Italy

[4] Grenoble Inst Technol, Mat & Genie Phys Lab, CNRS, F-38043 Grenoble, France

[5] European Synchrotron Radiat Facil, F-38043 Grenoble, France

来源：

PHYSICAL REVIEW B | 2010年 / 82卷 / 06期

关键词：

X-RAY-DIFFRACTION; INDUCED PHASE-TRANSITION; CRYSTAL-STRUCTURE; HIGH-PRESSURE; YALO3; PEROVSKITE; SINGLE-CRYSTAL; CAGEO3; EVOLUTION; GDFEO3; STATE;

D O I：

10.1103/PhysRevB.82.064109

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The high-pressure evolution of the YCrO3 perovskite structure (space group Pbnm) has been investigated using synchrotron powder diffraction, up to 60 GPa. The results show an anisotropy in the elastic moduli of the individual crystallographic axes: the b axis is appreciably less compressible than both a and c axes [K-a0=195 (5) GPa, K-b0=223 (7) GPa, and K-c0=200 (6) GPa, respectively]. This implies that YCrO3 becomes more distorted with increasing pressure, which is similar to what was previously found in YTiO3 but opposite to the behavior reported for YAlO3. Such contrasting trends are explained by the stronger confinement of Y ions in YAlO3 due to the smaller size of octahedral network in the orthoaluminate compared to the orthochromate.

引用

页数：7

共 35 条

[1] EVOLUTION OF THE DISTORTION OF PEROVSKITES UNDER PRESSURE - AN EXAFS STUDY OF BAZRO3, SRZRO3 AND CAGEO3 [J].