中国物理B ›› 2014, Vol. 23 ›› Issue (6): 69101-069101.doi: 10.1088/1674-1056/23/6/069101

• GEOPHYSICS, ASTRONOMY, AND ASTROPHYSICS • 上一篇    下一篇

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

李娜娜, 李岩, 李会, 唐瑞莲, 赵永胜, 韩丹丹, 马艳梅, 崔启良, 朱品文, 王欣   

  1. State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China
  • 收稿日期:2013-10-31 修回日期:2013-11-24 出版日期:2014-06-15 发布日期:2014-06-15
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 51172091), the Program for New Century Excellent Talents in University, China, and the National Fund for Fostering Talents of Basic Science, China (Grant No. J1103202).

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

Li Na-Na (李娜娜), Li Yan (李岩), Li Hui (李会), Tang Rui-Lian (唐瑞莲), Zhao Yong-Sheng (赵永胜), Han Dan-Dan (韩丹丹), Ma Yan-Mei (马艳梅), Cui Qi-Liang (崔启良), Zhu Pin-Wen (朱品文), Wang Xin (王欣)   

  1. State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China
  • Received:2013-10-31 Revised:2013-11-24 Online:2014-06-15 Published:2014-06-15
  • Contact: Zhu Pin-Wen, Wang Xin E-mail:zhupw@jlu.edu.cn;xin_wang@jlu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 51172091), the Program for New Century Excellent Talents in University, China, and the National Fund for Fostering Talents of Basic Science, China (Grant No. J1103202).

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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 β a = 0.60×10-3 GPa-1, β b = 0.79×10-3 GPa-1, β c = 1.28×10-3 GPa-1, and the bulk modulus (B0) 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.

关键词: crystal structure, high-pressure, X-ray diffraction

Abstract: 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 β a = 0.60×10-3 GPa-1, β b = 0.79×10-3 GPa-1, β c = 1.28×10-3 GPa-1, and the bulk modulus (B0) 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.

Key words: crystal structure, high-pressure, X-ray diffraction

中图分类号:  (High-pressure behavior)

  • 91.60.Gf
61.05.cp (X-ray diffraction) 61.50.-f (Structure of bulk crystals)