In-situ high pressure X-ray diffraction studies of orthoferrite SmFeO3

被引：11

作者：

Li Na-Na ^{[1
]}

Li Yan ^{[1
]}

Li Hui ^{[1
]}

Tang Rui-Lian ^{[1
]}

Zhao Yong-Sheng ^{[1
]}

Han Dan-Dan ^{[1
]}

Ma Yan-Mei ^{[1
]}

Cui Qi-Liang ^{[1
]}

Zhu Pin-Wen ^{[1
]}

Wang Xin ^{[1
]}

机构：

[1] Jilin Univ, State Key Lab Superhard Mat, Changchun 130012, Peoples R China

来源：

CHINESE PHYSICS B | 2014年 / 23卷 / 06期

基金：

中国国家自然科学基金;

关键词：

crystal structure; high-pressure; X-ray diffraction; RARE-EARTH ORTHOFERRITES; OXIDE; MAGNETISM; COLLAPSE; BEHAVIOR; LAFEO3; FE;

D O I：

10.1088/1674-1056/23/6/069101

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The high-pressure behaviors of SmFeO3 are investigated by angle-dispersive synchrotron X-ray powder diffraction under a pressure of up to 40.3 GPa at room temperature. The crystal structure of SmFeO3 remains stable at up to the highest pressure. The different pressure coefficients of the normalized axial compressibility are obtained to be beta(a) = 0.60 x 10(-3) GPa(-1), beta(b) = 0.79 x 10(-3) GPa(-1), beta(c) = 1.28 x 10(-3) GPa(-1), and the bulk modulus (B-0) is determined to be 293(3) GPa by fitting the pressure-volume data using the Birch-Murnaghan equation of state. Furthermore, the larger compressibility of the FeO6 octahedra suggests the evolution of the orthorhombic structure towards higher symmetry configuration at high pressures.

引用

页数：4

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