High pressure X-ray diffraction study of CaMnO3 perovskite

  • Using a diamond anvil cell device and synchrotron radiation, the in-situ high-pressure structure of CaMnO3 has been investigated. In the pressure up to 36.5 GPa, no pressure-induced phase transition is observed. The pressure dependence on the lattice parameters of CaMnO3 is reported, and the relationship of the axial compression coefficients is βacb. The isothermal bulk modulus K298=224 (25) GPa is also obtained by fitting the pressure-volume data using the Murnaghan equation of state.

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LIU Ying-Xin, QIN Shan, JIANG Jian-Zhong, Kikegawa Takumi and SHI Guang-Hai. High pressure X-ray diffraction study of CaMnO3 perovskite[J]. Chinese Physics C, 2010, 34(7): 1025-1028. doi: 10.1088/1674-1137/34/7/018
LIU Ying-Xin, QIN Shan, JIANG Jian-Zhong, Kikegawa Takumi and SHI Guang-Hai. High pressure X-ray diffraction study of CaMnO3 perovskite[J]. Chinese Physics C, 2010, 34(7): 1025-1028.  doi: 10.1088/1674-1137/34/7/018 shu
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Received: 2009-09-17
Revised: 2009-12-15
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High pressure X-ray diffraction study of CaMnO3 perovskite

    Corresponding author: LIU Ying-Xin,

Abstract: 

Using a diamond anvil cell device and synchrotron radiation, the in-situ high-pressure structure of CaMnO3 has been investigated. In the pressure up to 36.5 GPa, no pressure-induced phase transition is observed. The pressure dependence on the lattice parameters of CaMnO3 is reported, and the relationship of the axial compression coefficients is βacb. The isothermal bulk modulus K298=224 (25) GPa is also obtained by fitting the pressure-volume data using the Murnaghan equation of state.

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