Chin. Phys. B ›› 2013, Vol. 22 ›› Issue (1): 16103-016103.doi: 10.1088/1674-1056/22/1/016103

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇    下一篇

High-pressure effect on inverse spinel LiCuVO4: X-ray diffraction and Raman scattering

梁桁楠, 马春丽, 杜菲, 崔啟良, 邹广田   

  1. State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
  • 收稿日期:2012-08-28 修回日期:2012-10-12 出版日期:2012-12-01 发布日期:2012-12-01
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11074089 and 11004073) and the National Basic Research Program of China (Grant No. 2011CB808200).

High-pressure effect on inverse spinel LiCuVO4: X-ray diffraction and Raman scattering

Liang Heng-Nan (梁桁楠), Ma Chun-Li (马春丽), Du Fei (杜菲), Cui Qi-Liang (崔啟良), Zou Guang-Tian (邹广田)   

  1. State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
  • Received:2012-08-28 Revised:2012-10-12 Online:2012-12-01 Published:2012-12-01
  • Contact: Cui Qi-Liang E-mail:cql@jlu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11074089 and 11004073) and the National Basic Research Program of China (Grant No. 2011CB808200).

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摘要： Effect of external quasi-hydrostatic pressure on the inverse spinel structure of LiCuVO4 was studied in this paper. High-pressure synchrotron X-ray diffraction and Raman spectroscopy measurements were carried out at room temperature up to 35.7 and 40.3 GPa, respectively. At a pressure of about 20 GPa, both Raman spectra and X-ray diffraction results indicate that LiCuVO4 was transformed into a monoclinic phase, which remained stable up to at least 35.7 GPa. Upon release of pressure, the high-pressure phase returned to the initial phase. The pressure dependence of the volume of low pressure orthorhombic phase and high-pressure monoclinic phase were described by a second-order Birch-Murnaghan equation of state, which yielded bulk modulus values of B0=197(5) and 232(8) GPa, respectively. The results support the empirical suggestion that the oxide spinels have similar bulk modulus around 200 GPa.

关键词: high pressure, inverse spinel LiCuVO4, X-ray diffraction, Raman scattering

Abstract: Effect of external quasi-hydrostatic pressure on the inverse spinel structure of LiCuVO4 was studied in this paper. High-pressure synchrotron X-ray diffraction and Raman spectroscopy measurements were carried out at room temperature up to 35.7 and 40.3 GPa, respectively. At a pressure of about 20 GPa, both Raman spectra and X-ray diffraction results indicate that LiCuVO4 was transformed into a monoclinic phase, which remained stable up to at least 35.7 GPa. Upon release of pressure, the high-pressure phase returned to the initial phase. The pressure dependence of the volume of low pressure orthorhombic phase and high-pressure monoclinic phase were described by a second-order Birch-Murnaghan equation of state, which yielded bulk modulus values of B0=197(5) and 232(8) GPa, respectively. The results support the empirical suggestion that the oxide spinels have similar bulk modulus around 200 GPa.

Key words: high pressure, inverse spinel LiCuVO4, X-ray diffraction, Raman scattering

中图分类号:  (Crystallographic aspects of phase transformations; pressure effects)

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